JP2001113335A - Device and method for pressing weld zone of drum can, and drum can manufacture device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for pressing a weld zone of a drum can by which the weld zone of the drum of the drum can is exactly pressed and is uniform in shape and mechanical properties over the whole length thereof, and a drum can manufacturing device. SOLUTION: In the drum can weld zone pressing device 120 to squeeze a weld zone 201 of a drum part 200 of the drum can formed by rolling a steel sheet, a support arm 121 having a positional deviation preventive part 1211 is provided to hold the drum part by the support arm without any positional deviation when pressing the weld zone. Thus, the weld zone can be pressed correctly. The weld zone can be uniform in shape and mechanical properties over the whole length by changing the pressing method at an end portion and a center portion of the weld zone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for pressing a welded portion of a drum can, which presses a welded portion extending in the axial direction of the body of the iron drum having a capacity of, for example, 200 liters or 55 gallons. The present invention relates to a method for pressing a welded portion of a drum, which is performed by the device for pressing a welded portion of a drum, and a drum can manufacturing device provided with the device for pressing a welded portion of a drum.

[0002]

2. Description of the Related Art The body of an iron drum having a capacity of 200 liters or 55 gallons is rolled from a thin steel sheet into a cylindrical shape, and both ends along the axial direction of the cylindrical thin steel sheet are formed. It is formed by welding. Flange processing, so-called flanging, is applied to both ends of the body part,
After the reinforcing ring is formed and processed over the entire circumference of the body, oil, dirt, and the like adhering to the surface are removed. After the washing, a main plate and, if necessary, a top plate are attached to both ends of the body portion by winding or the like, and the drum can is manufactured.

[0003] Since the welded portion along the axial direction in the body portion has an oxide scale, the adhesion of the coating film in the welded portion is reduced when the body portion is coated,
Further, in the welded portion, a step is generated because the steel plates are overlapped, and the tightening when attaching the base plate or the top plate may be incomplete. Therefore, in order to solve such a problem, there is a welding part shaping device shown in FIG. 16 disclosed in, for example, Japanese Patent No. 2583840 in which the welding part is crushed by a roller. The welding part shaping apparatus is roughly divided into a base 3 having a support die 2.
And a pressurizing device 4 and operate as follows. That is, the pressing roller 13 and the pressing cylinder 11 for pressing the welding portion 1A are applied to the cylinder 1 placed on the supporting die 2 by bringing the welding portion 1A of the cylindrical body 1 into contact with the supporting die 2. The slider 8 provided at one end portion is moved from the pressing device 4 to the cylindrical body 1.
Insert into. Then, the slider 8 is moved along the welding portion 1A while operating the pressing cylinder 11 to press the welding portion 1A from the inner surface side of the cylindrical body 1 to the supporting die 2 side by the pressing roller 13, thereby moving the slider 8 along the welding portion 1A. 1A is flattened and the oxide scale is removed.

[0004]

However, in the welding part shaping apparatus described above, since the pressing roller 13 is inserted into the cylindrical body 1, the slider 8 must be long. The mechanism for holding and moving the slider 8 also becomes large. Further, since pressure is applied by the pressure roller 13 provided at one end of the long slider 8 opposite to the support side, it is difficult to obtain a sufficient pressing force by the pressure roller 13, Also, it is difficult to obtain the rigidity of the slider 8.

[0005] As shown in the figure, the cylindrical body 1 remains mounted on the support die 2 and is not supported. On the other hand, the upper surface of the support die 2 has a concave curved surface along the surface of the cylindrical body 1.
Is set slightly larger than the radius. Therefore,
During the pressing operation by the pressure roller 13, the cylindrical body 1
It can roll on the support die 2 in the circumferential direction, and lacks stability. Therefore, along the welding portion 1A, the welding portion 1
It is also conceivable that the pressure roller 13 cannot move accurately on A. On the other hand, if the cylindrical body 1 is supported, in a structure as shown in the figure, a method of sandwiching the cylindrical body 1 in the axial direction of the cylindrical body 1 from both end portions of the cylindrical body 1 can be considered. In the clamping method, the cylindrical body 1 may be deformed. Therefore, even if the structure for supporting the cylindrical body 1 is adopted, sufficient support cannot be obtained, and the
It is also conceivable that the pressure roller 13 cannot move accurately on A. Further, according to the above patent publication, only one welding part shaping device is installed, and there is no disclosure about backup in the event of a failure. In addition, even during normal operation, it takes a long time to process one cylindrical body 1 with one welding part shaping apparatus, and there is a problem in actual operation.

Further, in the manufacture of a steel drum using the above-described welding part shaping apparatus disclosed in the above-mentioned patent publication, a cylindrical body 1 is used.
Is cold-crushed by the pressing roller 13 on the welded portion 1A, and overhang portions are formed at both ends of the cylindrical body 1. After performing the cold-crushing operation, a process of cutting the overhang portion is performed. . Thus, in the welding part shaping device, the cutting operation of the overhang portion is performed after the cold crushing operation,
There is also a problem that the order of the processes is fixed, and the degree of freedom is low in the arrangement of the machines in the production line.

Further, since the patent publication states that the cold crushing produces overhangs at both ends of the cylindrical body 1, the pressure roller 13 is attached to the cylindrical body 1. Rolling traveling on the welded portion 1A over the entire length of In other words, the pressure roller 13 bites into one end of the cylindrical body 1, travels on the welded portion 1 </ b> A, and exits from the other end of the cylindrical body 1 in a pressurized state. In such a situation, generally, the one end and the other end in the axial direction of the can body have a smaller binding force of the material around the pressing point by the pressing roller than the central part of the can body. Deformation increases. Therefore, as shown in FIGS. 17 and 18, the thickness of the can plate is reduced and unsteady deformation occurs from the end of the can to the inside of the can by about tens of mm regardless of the thickness of the can body. Therefore, the mechanical properties of the can material are reduced at both ends of the can. In the manufacture of a drum can, the end of the can is subjected to the above-described processing such as flanging and crimping for attaching the base plate and the top plate. Damage such as cracks is likely to occur. FIG. 17 is a diagram when the pressure roller is engaged with one end of the can, and FIG. 18 is a diagram when the pressure roller is pulled out from the other end of the can. 17 and 18 show the case where the plate thickness is 1.6 mm, the fine dotted line shows the case of 1.2 mm, and the coarse dotted line shows the case of 1 mm.

The present invention has been made in order to solve such a problem, and it is possible to accurately press a welded portion of a body portion of a drum, and to form the welded portion in a uniform shape over the entire length thereof. To provide a drum can welding part pressing device capable of having mechanical properties, a drum can welding part pressing method executed by the drum can welding part pressing device, and a drum can manufacturing device provided with the drum can welding part pressing device. With the goal.

[0009]

In order to achieve the above object, the present invention is configured as follows. A drum can welding part pressing device according to a first aspect of the present invention is a base plate formed by welding both side end portions of a steel plate extending in an axial direction of a cylindrical body in a cylindrical body formed by bending a steel plate, A drum can welding part pressing device for crushing the welding parts of the both side end parts with respect to the drum body part before mounting the top plate,
A support inserted inside the drum can body, extending over the entire length of the welded portion along the axial direction and on the inner peripheral surface of the drum can body in the circumferential direction of the drum can body. A pressure receiving portion that extends along and covers at least the welded portion and that comes into contact with the welded portion during the crushing operation of the welded portion, and that the pressing portion is located on both sides sandwiching the pressure received portion in the circumferential direction. The support having a misalignment prevention portion for preventing misalignment of the drum can body portion during the crushing operation, and is disposed to face the support so as to sandwich the welded portion outside the drum can body portion, A pressing / moving device that moves along the axial direction while pressing the welded portion against the support during the crushing operation of the welded portion and crushes the welded portion to flatten the welded portion; It is characterized in.

[0010] The pressing and moving device may be configured to perform the crushing operation on a central portion of the welded portion along the axial direction in the axial direction.

A drum can manufacturing apparatus according to a second aspect of the present invention includes a conveying apparatus for sequentially conveying a plurality of drum body portions in a conveying direction along a conveying path, and the conveying path interposed therebetween. The two drum can welding part pressing devices according to any one of claims 1 to 3, which are respectively arranged on both sides, and the drum can body which has been conveyed by the conveying device to the drum can welding part pressing device. At the same time as mounting the part to one of the drum can welding part pressing device, a transfer device that detaches the drum can body part that has finished flattening the welding part from the other drum can welding part pressing device and returns to the transport path, It is characterized by having.

Further, in the drum can manufacturing apparatus according to the second aspect, the drum can welding portion pressing device performs a crushing operation on a central portion of the welding portion along the axial direction of the drum body portion in the axial direction. Can also be configured.

Further, in the drum can manufacturing apparatus of the second aspect, the drum can body is disposed on a pre-process side or a post-process side of the drum can weld pressing device, and excludes the central portion of the weld in the axial direction. It is configured to further include an end pressing device that squeezes and presses both ends of the welded portion located at both axial ends of the portion along the thickness direction of the welded portion to perform a crushing operation of the both ends. You can also.

[0014] In a third aspect of the present invention, a method for pressing a welded portion of a drum can is performed by welding both side ends of the above-mentioned steel sheet extending in the axial direction of the cylindrical body in the bent cylinder. A drum can welding part pressing method of crushing the welding parts at the both side ends with respect to the drum can body part before attaching the base plate and the top plate, wherein the center of the welding part in the axial direction of the drum can body part The roll is moved along the axial direction about the portion and crushed, and both ends of the welded portion located at both axial ends of the drum body portion excluding the center portion are along the thickness direction of the welded portion. The two ends are pinched and pressed to perform a crushing operation.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a pressing device for a drum can welding portion according to an embodiment of the present invention; About production equipment,
This will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals. Further, in this embodiment, a drum having a capacity of 200 liters is taken as an example.
It is not limited to liter drums. That is,
In the drum can welding part pressing device of the present embodiment, the drum can welding part pressing method, and the drum can manufacturing device, the welding part exists along the axial direction of the body part formed by rolling a steel plate,
Further, the present invention can be applied to a body part that requires flattening of the welded portion.

For example, as shown in FIG. 5, the drum manufacturing apparatus 101 in this embodiment is
, Drum welding part pressing device 120 and transfer device 130
Although not shown in FIG. 5, the drum manufacturing apparatus 101 includes an apparatus for manufacturing a cylindrical body by rolling a steel plate, and the apparatus extending in the axial direction of the manufactured cylindrical body. Weld both sides of the steel plate to form a weld 2 as shown in FIG.
The apparatus for producing the drum can body part 200 having the number 01 is installed on the pre-process side of the drum can welding part pressing device 120, and the post-process side of the drum can welding part pressing device 120 is disposed along the axial direction of the drum can body part 200. Forging a step at both ends of the welded portion 201, after flattening, is a device for cutting the overhang portions generated at the both ends by welding and forging,
A mash cutter device as an example that performs the function of an end pressing device, a device that performs flange processing on both ends of the drum body portion 200, a device that forms a reinforcing ring all around the body, and adheres to the surface. A cleaning device for removing oil, dirt, and the like, and a device for attaching a main plate and, if necessary, a top plate to both ends of the drum body portion 200 are installed.

As shown in FIG. 12, in the present embodiment, the mash cutter device 301 is provided on the post-process side of the drum can welding part pressing device 120 as described above.
It can also be provided on the pre-process side of the drum can welding part pressing device 120. Reference numeral 351 corresponds to an apparatus for manufacturing the drum can body portion 200 described above. The mash cutter device 301 is a known device having a structure disclosed in, for example, JP-A-7-16680. As shown in FIGS. 13 and 14, a mash cutter device 301 and a cutting device 3 are provided.
03. As shown in FIGS. 12 and 13, the drum body portion 200 having the welding portion 201
Since the sheet is conveyed in the conveying direction 111 along the direction 13, the pressing device 302 and the cutting device 303 are arranged one by one corresponding to both ends in the axial direction of the drum body portion 200. Each set of press device 302 and cutting device 30
3 are movable in the axial direction of the drum body portion 200, respectively.

The press device 302 includes a lower mold 3021 that moves up and down by a hydraulic cylinder, and an upper mold 3022 fixed to face the lower mold 3021. Lower mold 3021
The drum can body portion 200 is arranged so as to be sandwiched between the upper mold 3022 and the upper mold 3022. Therefore, the upper surface of the lower mold 3021 and the lower surface of the upper mold 3022 form a cylindrical surface having the same shape as the cylindrical shape of the drum body 200. or,
Lower mold 302 along the axial direction of drum body part 200
One has a length of about 35 mm and a width of about 55 mm.
The press device 302 configured as described above includes the lower mold 30
21 is raised to the upper mold 3022 side, and both ends of the welded portion 201 located at both axial ends of the drum body portion are sandwiched and pressed along the thickness direction of the welded portion 201 to press the both ends. Forging and flattening operations, that is, crushing operations.

The cutting device 303 comprises a blade 3031 for raising and lowering the overhang portions formed at both ends by the welding and the forging by a hydraulic cylinder, and a lower mold 3021.
And the operation of disconnecting is performed.

In the present embodiment, the transfer device 110
The drum body portions 200-1, 200-2, 200-3,... Placed on the conveyor 112 are one pitch at a time so as to be continuously loaded one by one into, for example, the drum welding portion pressing device 120 described above. Drum body part 2 above
This is a device for sequentially transporting 00 in a transport direction 111 indicated by an arrow. Accordingly, the above-described drum can welding part pressing device 120 is provided along the conveying path 113 along which the conveying conveyor 112 extends.
Also, the mash cutter device 301, the flange processing device, the ring forming device, and the like are installed.

The detailed structure of the drum can welding part pressing device 120 will be described below. In this embodiment, the drum can welding part pressing device 120 is provided along the direction perpendicular to the conveying direction 111, and functions as a support. The support path 121 as an example to fulfill is extended,
A drum can welding part pressing device 120-1 is provided on the left side in the transport direction 111 with the drum 13 therebetween, and a drum can welding part pressing device 120-2 is provided on the right side. Such a drum welding part pressing device 120 presses the welding part 201 of the drum body part 200.

Although the detailed structure of the transfer device 130 will be described below, in the present embodiment, the transfer device 130 includes the drum body 200 that has been transported along the transport path 113.
Is loaded into one drum can welding part pressing device, for example, the drum can welding part pressing device 120-1, and the drum can body portion 200, which has been flattened at the welding part, is further pressed with the other drum can welding part pressing device, for example, the drum can welding part Pressing device 12
This is a device that leaves from O-2 and returns to the transport path 113.

Next, the structure of the drum can welding part pressing device 120 will be described. As described above, in the present embodiment, two drum-can welding-part pressing devices 120-1 and 120-2 are provided. However, since both have the same structure, the same components are denoted by the same reference numerals. In the following, the drum can welding part pressing device 120 will be described by taking the drum can welding part pressing device 120-1 as an example. As shown in FIG. 1, the drum can welding part pressing device 120-1
7, a column 128 standing upright at one end of the base 127, and a support arm 121 extending from the column 128 opposite to and parallel to the base 127. Base part 127, support part 128, and support arm 1
21 form a U-shaped outer shape. Such a drum can welding part pressing device 120-1 generally includes the support arm 121, the pressing and moving device 122, and the support member 123. The pressing and moving device 122 is installed at a portion sandwiched between the support arm 121 and the base 127. As shown in FIG. 4, the support member 123 is provided with the welding portion 2 in the circumferential direction of the drum body portion 200.
No. 01 is a member that is disposed at the center portion and supports the drum body portion 200 on both the left and right sides of the welded portion 201, and is a member that extends along the axial direction of the drum body portion 200. Also, each of the support members 123 arranged on the left and right
Is to allow the drum body portion 200 supported by the support member 123 to move smoothly in the axial direction.
Roller 123 rotatably supported by the support member 123
1 are provided along the axial direction.
1 contacts the drum body 200. Such a support member 123 is installed on a common frame 161 provided in an elevating device 160 to be described later.
In the vertical direction, the common frame 161 is lowered to a height position 162,
The support member 1 is moved up and down between the ascending height position 163.
23 also goes up and down.

The support member 123 supports the drum body portion 200 when the drum body portion 200 is loaded on the support arm 121, and is disposed at a position corresponding to a position preventing portion 1211 described later in the support arm 121. Is done. Further, as described later, in the present embodiment, since the drum body portion 200 is held by the suction pad 1215 provided on the displacement prevention portion 1211, the support member 123 and the displacement prevention portion 1211 are located at positions corresponding to each other. By being disposed, the drum can body portion 200 during the period from the loading to the pressing operation of the welding portion 201
The support member 1 also has a function of preventing the circumferential displacement of the support member 1.
23 has.

The support arm 121 is inserted inside the drum body portion 200, extends along the welded portion 201, has a length extending through the drum body portion 200, and has a substantially oval cross section. Steel member having
As described later, the welding part 2 by the pressing and moving device 122 is used.
01 has a pressure receiving member 1212 that comes into contact with the welded portion 201 during the crushing operation. The pressure receiving member 1212 extends over the entire length of the welded portion 201 along the axial direction of the drum can body portion 200, and the drum can body portion 200
Extends along the inner peripheral surface of the drum body portion 200 in the circumferential direction and covers at least the welded portion 201. Further, as shown in FIG. 4, the support arm 121 has two displacement prevention portions 1211. The displacement prevention portion 1211
In the circumferential direction of the drum can body part 200, the pressure receiving member 1212 is interposed therebetween, and the drum can body part 2 is at least positioned to oppose the respective support members 123.
It is formed by extending the support arm 121 along the inner peripheral surface 202 of the drum 00, and holds the drum body portion 200 during the crushing operation, thereby preventing displacement.
Therefore, at the time of the above-mentioned crushing operation, the drum can body portion 20
0 does not become unstable, and the pressing and moving device 122
Thus, accurate pressing can be performed without causing the welding portion 201 to be displaced against a pressing roll 1221 described below.

In the present embodiment, the cross-sectional shape of the support arm 121 is a roughly oval shape as shown in FIG. 4, but is not limited to this shape. That is, the rigidity enough to withstand the crushing operation and the displacement prevention portion 1211
What is necessary is just the shape which has.

In the support arm 121 of the present embodiment,
The pressure receiving member 12 which is a portion where the welding portion 201 is pressed.
The width dimension along the circumferential direction at 12 is the same as or larger than the width dimension of the pressing roller 1221 described later. Such a pressure receiving member 1212 has a slightly smaller diameter than the inner diameter of the drum can body portion 200, is detachable from the support arm main body portion 1213, and is attached to the main body portion 1213 by, for example, a bolt 1214. Therefore, when the pressure receiving member 1212 is deformed due to aging or the like, only the pressure receiving member 1212 can be replaced.

Further, in the support arm 121 of this embodiment,
At the time of the above-described crushing operation, each of the displacement prevention portions 1211 is provided with an electromagnet-type suction pad 1 such that the drum can body portion 200 is held by the displacement prevention portion 1211.
215 is buried. An excitation device 1216 that excites and deenergizes the electromagnet is connected to the electromagnet provided on each suction pad 1215, and the operation of the excitation device 1216 is controlled by the control device 180. The suction pad 12
Reference numeral 15 is not limited to the structure having the above-described electromagnet.
Any structure may be used as long as the drum can body portion 200 can be held by the suction pad 1215 of 211, and for example, a structure for performing a suction operation may be used. In this case, a suction device is provided instead of the excitation device 1216.

Next, the pressing and moving device 122 will be described. The pressing and moving device 122 includes a drum body portion 20.
0, and is arranged opposite to the support arm 121 so as to sandwich the welded portion 201. When the welded portion 201 is crushed, the shaft of the drum can body portion 200 is pressed while the welded portion 201 is pressed against the support arm 121. It is a device that moves along the direction to crush and flatten the welded portion 201, and includes a pressing roller 1221, a pressing device 1222, a guide member 1223, a traveling vehicle 1224, and a traveling vehicle moving device 1225. Is provided. These components will be described below, but by adopting the following configuration, the configuration related to the pressing of the welded portion 201 is compared to the structure of holding and moving the long slider 8 as in the conventional device. Can be simplified and made compact, furthermore, the occurrence of failure can be reduced, and the degree of freedom in the specification design of the pressing and moving device 122 can be improved.

As shown in FIG. 3, the pressing roller 122
Reference numeral 1 denotes a steel roller which comes into contact with the welded portion 201 and crushes the welded portion 201. In this embodiment, the roller has a diameter of φ.
It has a size of 150 mm and a width of 50 mm. Further, the peripheral surface of the pressing roller 1221 that comes into contact with the welding portion 201 is
The pressing roller 1221 may be in the form of a flat plate parallel to the axial direction, a slightly raised drum-shaped shape, or a slightly concave shape, and a surface quenching process. Is given. When the drum-shaped swelling form is adopted, a load can be intensively applied to the welded portion 201 of the drum can body portion 200, and with a lower pressing force as compared with the flat case or the recessed case. The same effects as those can be obtained. In the recessed form, the peripheral surface of the pressing roller 1221 has a curved surface with a radius slightly larger than the radius of the outer peripheral surface of the drum body part 200. When such a concave form is adopted, the drum member body 200
Is supported, even if the welded portion 201 of the drum can body portion 200 is slightly displaced in the circumferential direction of the drum can body portion 200 with respect to the vertical direction, compared to the drum-shaped case, the pressing roller Reference numeral 1221 can reliably crush the welded portion 201. Also, when the flat form is adopted, an intermediate action and effect between the drum-like form and the concave form can be obtained.

The pressing roller 1221 is rotatably attached to the bearing member 12211. still,
Even if the drum-shaped peripheral surface is used, the width of the pressing roller 1221 is larger than the width of the welding portion 201, so that the pressing roller 1221 is actually
Not only the welded portion 201 but also both side portions of the welded portion 201 can be pressed along the circumferential direction of the drum body portion 200. The pressing device 1222 generates a pressing force when the pressing roller 1221 is pressed against the welded portion 201 of the drum body portion 200 loaded on the support arm 121 along the diametric direction of the drum body portion 200. In the present embodiment, a hydraulic cylinder is provided, and a load of up to 10 tons can be applied to the pressing roller 1221 by operation control of the control device 180. It should be noted that a pneumatic cylinder or an electric cylinder can be used instead of the hydraulic cylinder.

The guide member 1223 is mounted on the base 127 of the drum welding part pressing device 120-1.
7, a guide member 1223-1 and a guide member 1223--2 laid in parallel with each other along the axial direction of the drum body portion 200 mounted on the support arm 121 along the extending direction of the support arm 121. -1 and a guide member 122 provided on the base 127 in parallel with
3-3, and a guide member 1223-4 provided on the base portion 127 so as to be opposed to and parallel to the guide member 1223-2. The guide member 1223 is connected to the traveling carriage 12 described below.
Traveling truck 1 so that 24 can move along the axial direction.
224 is guided.

The traveling carriage 1224 includes the bearing member 12211 to which the pressing roller 1221 is attached.
And a main body 12242 on which the pressurizing device 1222 is mounted.
And a wheel 12241 rotatably attached to the main body 12242 and engaged with the guide member 1223. The bearing member 12211 is vertically movable by a pressurizing device 1222 while being supported by the main body 12242. Traveling vehicle 12 having such a configuration
Reference numeral 24 denotes a drum can body part 20 attached to the support arm 121.
0 is loaded, the pressing roller 1221 positioned opposite to the welding portion 201 is
While pressing against the welding portion 201, the welding member 201 is guided by the guide member 1223 with which the wheel 12241 is engaged.
Move along.

The traveling carriage moving device 1225 moves the traveling carriage 1224 along the axial direction of the drum body 200 so that the pressing roller 1221 can move along the welding portion 201. In the present embodiment, the hydraulic cylinder whose operation is controlled by the control device 180 corresponds to the traveling carriage moving device 1225. The hydraulic cylinder is fixed to a gantry 170 installed below the conveying path 113 of the drum body part 200 conveyed by the conveying device 110, and the drive shaft 1 of the hydraulic cylinder is
2251 is connected to the main body 122 of the traveling carriage 1224.
42. Therefore, the traveling carriage 1224 moves in the axial direction due to the expansion and contraction of the drive shaft 12251 of the hydraulic cylinder. It should be noted that a pneumatic cylinder or an electric cylinder can be used instead of the hydraulic cylinder.

Next, a description will be given of the lifting / lowering device 160 which moves the support member 123 in the vertical direction. As described above, in the present embodiment, the support arm 121 provided in the drum can welding part pressing device 120 extends along the direction perpendicular to the transfer direction 111, and the transfer is performed with the transfer path 113 interposed therebetween. On the left side of the direction 111, the drum welding part pressing device 120-1 is provided, and on the right side, the drum welding part pressing device 12 is provided.
0-2 are installed. Therefore, the lifting device 160 in the present embodiment includes the drum can welding portion pressing device 120-1.
And the respective supporting members 123 provided in the drum welding portion pressing device 120-2 and the transport path 113, the drum welding portion pressing devices 120-1 and 120-2.
The transport body supporting member 124 on which the drum can body portion 200 has reached the transfer location 114 corresponding to the installation position of 0-2 is simultaneously moved up and down. From such a configuration, the elevating device 160 of the present embodiment, for example, as shown in FIG.
A common frame 161 on which the support members 123 and the transport body support member 124 are installed, and an elevating cylinder 164 for vertically moving the common frame 161 between the lowered height position 162 and the raised height position 163. , The common frame 161
And a guide rod 165 for guiding the ascending and descending movement.

Here, the lower height position 162 is set so that the drum body 200 during the transfer by the transfer device 110 can be transferred on the transfer path 113 without interfering with the transfer body support member 124. This is the height position of the common frame 161 when the torso support member 124 is lowered. The raised height position 163 is set so that the transfer body support member 124 and the support member 123 are moved to such an extent that the transfer operation of the drum body part 200 between the drum welding part pressing device 120 and the transfer path 113 is possible. This is the height position of the common frame 161 when it is raised. When the drum body portion 200 is placed at the elevation position 163 and loaded on the support arm 121, the welding portion 201 of the drum body portion 200 is attached to the support arm 121.
They are placed close enough to almost touch.

The elevating cylinder 164 is provided with a common frame 161.
The guide rod 165 is located at the center of the
It is installed at four places surrounding the lifting cylinder 164, and the lifting cylinder 164 is fixed to the base 170,
The guide rod 165 is attached to the gantry 170 so as to be able to expand and contract in the vertical direction. The common frame 16
1 is configured so as not to interfere with the pressing and moving device 122 due to the movement of the common frame 161 by elevating and lowering. In the present embodiment, the lifting cylinder 164 uses a hydraulic cylinder whose operation is controlled by the control device 180. However, the invention is not limited to this, and a pneumatic cylinder or an electric cylinder may be used. Can also.

Next, the transfer device 130 will be described. As described above, the transfer device 130 loads the drum can body portion 200 from the transport path 113 to the drum can welding portion pressing device 120 or the drum can welding portion pressing device 120.
This is a device that is separated from the paper path and returned to the transport path 113. In the present embodiment, as shown in FIGS. 1 and 2, the device includes a claw 133, a guide 131, and a drive cylinder 132 as a drive source. The guide 131 is provided with two drum can welding part pressing devices 120-1 and 120-2 installed opposite to each other.
At the upper part, the extending direction of each support arm 121,
That is, it is installed across the transport path 113 along the axial direction of the drum can body portion 200, and supports the claw 133 in a suspended state and slidably. The drive cylinder 132 is an air cylinder in the present embodiment, and the claw portion 13 is formed by expansion and contraction of an output shaft 1321 of the air cylinder.
3 is moved in the axial direction along the guide 131. The operation of the drive cylinder 132 is controlled by the control device 180. In addition, the drive cylinder 132 is not limited to the air cylinder, and may be a hydraulic cylinder or an electric cylinder. The claw portion 133 has a claw member 1331. As shown in FIG. 1, when the two drum can body portions 200 are arranged in series along the axial direction of the drum can body portion 200, the shaft of each drum can body portion 200 is formed. One claw member 1331 is provided at each end in the direction. That is, in the present embodiment, as shown in the drawing, three claw members 1331 are provided at a pitch slightly exceeding the entire length of the drum can body portion 200, and these three claw members 133 are provided.
1 is integrally formed with the driving cylinder 132
Is driven in the axial direction.

The claw member 1331 is connected to the lifting device 16.
In a state where the common frame 161 is disposed at the elevation height position 163 at 0, the upper part of the drum body 200 can interfere with the axial end of the drum body 200. Therefore, in the interference-possible state, the claw portion 133 is moved in the axial direction by the operation of the drive cylinder 132, for example, the roller 1231 of the transport body support member 124 installed in the transport path 113 is provided. The drum body 200 supported above is moved to and loaded on the support arm 121 of the drum welding part pressing device 120-1. More specifically, with reference to the state shown in FIG. 1, by moving the claw portion 133 toward the drum can welding part pressing device 120-2 by the operation of the drive cylinder 132, the roller of the transfer body support member 124 is moved. Drum can body part 2 existing on the conveyance path 113 supported on 1231
00-2 is loaded on the support arm 121 of the drum can welding part pressing device 120-2. Furthermore, since the three claw members 1331 are provided as described above, the drum can body part 200-1 loaded on the support arm 121 of the drum can welding part pressing device 120-1 is simultaneously drum-welded at the same time as the loading operation. The sheet is detached from the unit pressing device 120-1 and is transferred onto the transfer body support member 124 in the transfer path 113.
Thereafter, by performing such an operation, the drum can body portion 200 can be continuously loaded and unloaded from the drum can welding portion pressing device 120.

The operation of the drum can manufacturing apparatus and the drum can welding part pressing apparatus of the present embodiment having the above-described configuration will be described below. The following operation control is executed under the control of the control device 180. As shown in FIG. 2, the respective drum can body portions 200 in which the welding portions 201 are positioned in the direction of gravity due to gravity are moved through the conveying path 113 by the conveying device 110 in the conveying direction 11 as shown in FIG. 5.
Each of them is conveyed to the transfer place 114 one by one.
The drum body 200 that has reached the transfer location 114
-1 stops. Next, the elevating device 160 operates,
The common frame 161 is raised by the lifting cylinder 164 from the lower height position 162 to the higher height position 163. Along with this, the rollers 1231 of the transport body support member 124 come into contact with the outer surface of the drum body section 200-1, and the drum body section 200-1 is supported by the transport body support member 124 and rises.

After the common frame 161 reaches the height position 163, the transfer device 130 operates. Therefore, the claw member 1
331 abuts on the axial end of the drum can body portion 200-1, and the drum can body portion 200-1 moves on the rollers 1231 of the support member 124 for the transport body and the support member 123 of the drum can welding part pressing device 120-1. Drum body 2
It moves in the direction of arrow 150 shown in FIG. 6 in the axial direction of 00-1 and is loaded on the support arm 121 of the drum can welding part pressing device 120-1.

Drum can body part 200-1 loaded in support arm 121 of drum can welding part pressing device 120-1
Is held on the lower surface of the support arm 121 by excitation of the electromagnet type suction pad 1215 provided on the displacement prevention portion 1211 of the support arm 121. When the drum can body part 200-1 is held by the support arm 121, the common frame 161 is lowered to the lowered height position 162 by the operation of the elevating device 160, and the support member 123 and the transport body support member 124 are also moved. Go down. After the holding, the pressing and moving device 12
2 works. That is, the pressing roller 1221 of the pressing moving device 122 arranged at the axial end of the drum can body portion 200-1 is pressed by the operation of the pressing device 1222 against the welding portion 201 of the drum can body portion 200-1, and the supporting arm While the welding unit 201 is crushed and the oxide scale is removed by the welding unit 121, the pressing unit 122 moves in the axial direction of the drum body part 200-1 along the welding part 201 by driving the traveling carriage moving device 1225 of the pressing moving device 122. .

As described above, in the present embodiment, as a post-process of the pressing operation by the drum welding portion pressing device 120, the welding portion 2 along the axial direction of the drum body portion 200 is provided.
Since both ends of 01 are flattened by the mash cutter device 301, the pressing operation by the pressing roller 1221 is unnecessary. Therefore, the length by which the pressing roller 1221 actually presses the welding portion 201 is the length excluding the above-mentioned both ends of the welding portion 201. In the present embodiment, the lengths of the both end portions are each about 20 mm inward from the end face of the drum body portion 200.

In this embodiment, the pressing roller 1221
The range in which only pressing is performed is the drum body 200
Are set so as to be in the central part range of the drum body part 200 excluding about 35 mm from the both end faces to the inside. The value of 35 mm is determined for the following reasons. That is, when the entire length of the welding portion 201 is pressed only by the pressing roller 1221 without using the mash cutter device 301, as can be inferred from FIGS. 17 and 18, the thickness of the welding portion is reduced to about 15 mm from the end of the can. Occurs. Therefore, at least 15 mm from the end of the can
01, it is considered necessary to perform the pressing operation, and further, the positioning accuracy of the pressing roller 1221 and the mash cutter device 301
The above value is determined in consideration of the overlap area between the pressing operation range by the pressing roller 1221 and the pressing operation range by the pressing roller 1221. Therefore, from about 20 mm to about 35 mm
The range up to corresponds to the overlap area.
In the present embodiment, when the thickness of the material of the drum can body portion 200 is 1 mm, the mash cutter device 301
The pressing force at both ends of the drum body portion 200 is controlled so that the thickness of the welded portion 201 from the end of the drum to the above-mentioned 35 mm position is 1.15 mm.
Further, the pressing force of the pressing roller 1221 for pressing the central portion of the welded portion 201 excluding the both ends is controlled so that the thickness of the welded portion 201 is 1.25 mm.

Further, as described above, both ends are pressed with the pressing roller 1.
The following effect also occurs by not pressing at 221. That is,
When the both ends are to be pressed by the pressing roller 1221, the drum body portion 20 by the pressing roller 1221 is pressed.
The pressing roller 1221 must maintain a state in which a load is applied before the pressing of 0 and at the end of the pressing. Therefore, even if it is attempted to bite the pressing roller 1221 into one end of the welded portion 201 while applying a load, it is difficult to bite the first, and the pressing roller 1221 cannot be bitten and moves with the pressing roller 1221 and the drum body part. 200 may be moved in its axial direction. Further, the pressing roll 1221 is easily damaged. On the other hand, while the load is being applied, the pressing roller 122
1 is removed, the pressing roller 1221 is
When the drum body 200 is disengaged, the drum body portion 200 may move in a direction opposite to the direction in which the pressing roller 1221 moves, which may hinder the next operation of the drum body portion 200. Further, the pressing roller 1221 is connected to the welding portion 2.
Since the pressing roll 1221 collides with the support arm 121 when deviated from 01, both are likely to be scratched, and further, the collision of the support arm 121 and the like may be accelerated by repeating the above collision. There is also a problem that the strength design of the support arm and the like must be made larger than necessary.

FIG. 15 shows a case where the end of the welded portion 201 where the thickness of the material of the drum body 200 is 1.0 mm is pressed by the mash cutter device 301 and a case where the end is pressed while being bitten by the pressing roll 1221. 3 shows the thickness distribution of the welded portion 201. In addition, as shown in FIG. 4, the thickness of the welded portion 201 is about 1.6 mm because of the overlap of the above-mentioned materials. As is clear from FIG. 15, when the mash cutter device 301 is used, the thickness is hardly thinned, while in the case of the pressing roll 1221, the thickness is several mm from the end of the can. It will be thin. Note that, as described above, the mash cutter device 301
The pressing force is controlled so that the thickness of the mash cutter 1 is 1.15 mm. In FIG. 15, the mash cutter device 301 has the thickness of 1.15 mm or less in a range of several mm from the end of the can. This is not due to the pressing force, but formed during the welding operation. By pressing both ends of the welding portion 201 located at both ends of the drum can body portion 200 with the mash cutter device 301 in this way, the welding portion 201 can be prevented from being too thin. Therefore, the mechanical properties at the both end portions of the welded portion 201 can be improved, and specifically, the deterioration prevention at the both end portions of the welded portion 201 in the flange processing, the deterioration prevention of the deformability due to work hardening, the minute Cracking can be prevented. In addition, in a test performed by the applicant, when the above-described flange processing was performed on both ends of the two types of drum body portions 200 for which the data shown in FIG. The case where the mash cutter 301 was pressed while being bitten reached three times the case where the mash cutter device 301 was used.

As described above, in the present embodiment, the displacement prevention portion 1211 is provided on the support arm 121, and the suction pad 1215 is further provided on the displacement prevention portion 1211, and the drum can body portion 20 is provided on the lower surface of the support arm 121.
0, the pressing and moving device 122
In the pressing operation of the welding portion 201 by the above, the drum body portion 200 does not shift. Therefore, the welding portion 201 can be accurately and stably pressed by the pressing roller 1221. Further, the holding by the suction pad 1215 can prevent the deformation of the drum can body portion 200 as compared with the conventional case in which the drum can body portion is sandwiched and held from both ends of the drum can body portion.

In this embodiment, the support arm 12 fixed to the column 128 of the drum welding portion pressing device 120 is used.
1 is arranged inside the drum can body portion 200, and the welding portion 201 is pressed from the outside of the drum can body portion 200 to the support arm 121 by the pressing roller 1221, so that the conventional long slider 8 is used. The rigidity of the portion involved in the pressing operation of the welded portion 201 is higher than in the conventional structure, as compared with the structure in which the pressing device is provided at the tip of the welding portion. Accordingly, the ability to follow the change in the amount of crushing of the welded portion 201 with respect to the change in the pressing force by the pressing roller 1221 is better than in the past, and the control of the pressing force by the pressing roller 1221 is easier than in the past.

On the other hand, in parallel with the pressing operation by the pressing and moving device 122, before the pressing operation is completed, as shown in FIG. 7, the conveying device 110 is operated to operate the next drum can body portion 200-. 2 is carried into the transfer place 114 on the transport path 113. After the pressing operation by the pressing and moving device 122 is completed, the operation of the elevating device 160 causes the common frame 161 to rise again to the ascending height position 163.
Accordingly, the drum body portion 200-2 disposed at the transfer location 114 is raised by the support member 124 for the transport body, and the roller 1231 of the support member 123 approaches the outer surface of the drum body portion 200-1 again. Support member 123
After the roller 1231 approaches the outer surface of the drum body portion 200-1 again, the excitation of the suction pad 1215 is released, and the drum body portion 200-1 is supported on the roller 1231 of the support member 123.

After the common frame 161 reaches the height position 163, the transfer device 130 operates. Therefore, the claw member 1
331 abuts on the respective axial ends of the drum can body portion 200-1 and the drum can body portion 200-2. The drum can body part 200-1 is shown in FIG. 8 on the rollers 1231 of the support member 123 of the drum can welding part pressing device 120-1 and the support member 124 for the carrier body in the axial direction of the drum can body part 200-1. Arrow 151
In the direction of the arrow, and presses the drum can welding part pressing device 120-1.
From the support arm 121 to the transport path 113. On the other hand, in parallel with the transfer operation of the drum can body portion 200-1, the drum can body portion 200-2
1 in the direction of the arrow 151, and
To the support arm 1 of the drum can welding part pressing device 120-2
21 is loaded.

The drum can body part 200-2 loaded on the support arm 121 of the drum can welding part pressing device 120-2.
On the other hand, the above-described holding operation by the suction pad 1215, the pressing operation by the pressing and moving device 122, and the release of the holding operation of the suction pad 1215 performed on the drum body part 200-1 are performed by the drum body part 200-1. Is executed in the same way as Also, as shown in FIG. 9, the operation for arranging the next drum body portion 200-3 at the transfer place 114 is performed in the same manner as described above.

In this way, each drum body 200
, The pressing operation of the welding portion 201 is continuously performed. In addition, the drum body part 20 on which the pressing operation was performed
The “0” is transferred by the transfer device 110 to an apparatus that executes the next step.

In the present embodiment, as shown in FIG.
Although the drum body 200 is configured to be transported in the direction of the 0 axis direction, the drum body 200 may be transported with the transport direction 111 and the axial direction being parallel. In this case, similarly to the above-described embodiment, when the drum can welding part pressing device 120 is arranged along the direction orthogonal to the transport direction 111, the drum can body part 20
0 to the drum can welding part pressing device 120,
A device for changing the axial direction of the drum body 200 from the transport direction 111 to the above-described orthogonal direction is required. On the other hand, FIG.
As shown in FIG. 1, if the drum can welding part pressing device 120 is arranged parallel to the transport direction 111, such a changing device is unnecessary.

Also, in this embodiment, as shown in FIG. 1 and the like, two drum can welding part pressing devices 120-1 and 120
-2 is provided to shorten the time required to process one drum body portion 200.
Only a stand may be provided.

In this embodiment, the support arm 12
The drum body 200 is held by the suction pad 1215 against the position deviation preventing part 1211, but the steel plate of the drum body 200 is pressed against the position deviation preventing part 1211 from the outside of the drum body 200. It is also possible to use, for example, a clamp device or the like so as to hold it.

In the present embodiment, the transport direction 111
The mash cutter device 301 is disposed on the downstream side of the drum can welding portion pressing device 120 along the line. However, the drum can welding part pressing device 120 may
Since the above-mentioned both end portions are not pressed and only the above-mentioned center portion is pressed, the above-mentioned overhang portion does not occur due to the pressing operation of the drum can welding portion pressing device 120. Therefore, in this embodiment, there is no problem before and after each operation of the drum can welding part pressing device 120 and the mash cutter device 301. Therefore, as shown in FIG. 12, the mash cutter device 301 can be disposed on the pre-process side of the drum can welding portion pressing device 120. As described above, in the present embodiment, the order of the processes is not fixed as in the related art, and the degree of freedom in the arrangement of machines in the production line and the like is higher than in the related art.

[0057]

As described above in detail, according to the drum can welding portion pressing device of the first embodiment and the drum can manufacturing device of the second embodiment of the present invention, the support having the misalignment preventing portion is provided. During the pressing operation of the welded portion, the drum body portion is held without being displaced by the support. Therefore,
The weld can be pressed accurately.

According to the third aspect of the present invention, in the method for pressing a welded portion of a drum can, a roll is moved and crushed at a central portion of the welded portion, and both ends of the welded portion excluding the central portion are removed. Since the both ends are sandwiched, pressed, and crushed along the thickness direction of the welded portion, it is possible to prevent the thickness of the both ends from becoming too thin. Therefore, the mechanical properties of the both end portions can be improved as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a front view of a drum can welding part pressing device in an embodiment of the present invention.

FIG. 2 is a side view, including a partial cross section, of the drum can welding part pressing device shown in FIG.

FIG. 3 is a diagram for mainly explaining a pressing and moving device portion provided in the drum can welding portion pressing device shown in FIG. 1, and is a cross-sectional view of the pressing and moving device.

FIG. 4 is a diagram for mainly explaining a support arm portion provided in the drum can welding portion pressing device shown in FIG. 1, and is a cross-sectional view of the support arm portion.

FIG. 5 is a plan view showing the arrangement of the drum can welding part pressing device shown in FIG. 1 in the drum can manufacturing device according to the embodiment of the present invention, and is a view for explaining the operation of the drum can manufacturing device. .

FIG. 6 is a view for explaining the operation of the drum can manufacturing apparatus, and is a view showing the next operation after the operation shown in FIG. 5;

FIG. 7 is a view for explaining the operation of the drum can manufacturing apparatus, and is a view showing the next operation after the operation shown in FIG. 6;

FIG. 8 is a view for explaining the operation of the drum can manufacturing apparatus, and is a view showing the next operation after the operation shown in FIG. 7;

FIG. 9 is a diagram for explaining the operation of the drum can manufacturing apparatus, and is a diagram showing an operation subsequent to the operation shown in FIG.

10 is a perspective view of a drum can body part to which a welding part is pressed by the drum welding part pressing device shown in FIG. 1;

FIG. 11 is a plan view of a modification of the drum manufacturing apparatus shown in FIG.

FIG. 12 is a diagram showing a drum can welding part pressing device shown in FIG. 1 and FIG.
FIG. 4 is a diagram showing an arrangement relationship with a mash cutter device shown in FIG.

FIG. 13 is an overall view of a mash cutter device included in the drum manufacturing apparatus according to the embodiment of the present invention.

FIG. 14 is an enlarged view of a press device portion and a cutting device portion in the mash cutter device shown in FIG.

FIG. 15 is a graph showing a change in the thickness of the welded portion when the welded portion is pressed only by a pressing roller and when the mash cutter device is used to press both ends of the welded portion.

FIG. 16 is a perspective view of a conventional welding part shaping apparatus.

FIG. 17 is a graph showing a change in the thickness of the welded portion when pressing is performed while biting into the end of the welded portion by the pressing roller.

FIG. 18 is a graph showing a change in thickness of the welded portion when the pressure roller comes off from the end of the welded portion while pressing the welded portion with the pressure roller.

[Explanation of symbols]

101: drum can manufacturing device, 110: transport device, 111
... conveying direction, 113 ... conveying path, 120 ... drum can welding part pressing device, 121 ... support arm, 122 ... pressing and moving device, 123 ... supporting member, 124 ... conveying body support member,
130: transfer device, 200: drum body part, 201
… Weld section, 301 mash cutter device.

Continued on the front page (72) Inventor Goji Katsushima 2-6-1-713 Higashi-Chiba, Chuo-ku, Chiba-shi, Chiba F-term (reference) 3E033 AA07 BA08 DA08 DD01 EA20

Claims (10)

[Claims] 1. A drum body portion of a cylindrical body formed by bending a steel plate, which is produced by welding both side ends of the steel plate extending in the axial direction of the cylindrical body to each other before a base plate and a top plate are attached. 200), which is a drum can welding part pressing device for crushing the welding parts (201) at both end parts, wherein the support (12) is inserted inside the drum body part.
1) wherein at least the welded portion extends over the entire length of the welded portion along the axial direction and extends along the inner peripheral surface of the drum body portion in the circumferential direction of the drum body portion. A cover (1212) that comes into contact with the weld during the crushing operation of the cover;
A position preventing portion (1211) that is positioned on both sides of the pressure receiving portion in the circumferential direction and that prevents the position of the drum body portion during the crushing operation;
And a support (121) having the following configuration. The support (121) is disposed opposite to the support so as to sandwich the welded portion outside the drum body portion, and the welded portion is attached to the support during the crushing operation of the welded portion. And a pressing / moving device (122) that moves along the axial direction while pressing to crush and flatten the welded portion. 2. The drum can welding part pressing device according to claim 1, wherein the misalignment preventing portion has a suction device (1215) for sucking and holding the drum body portion. 3. When the drum can body is loaded on the support, the drum can body is supported, and the drum can body is disposed at a position corresponding to the displacement preventing portion. The drum can welding part pressing device according to claim 1 or 2, further comprising a support member (123) for preventing displacement of the drum can body during the movement. 4. The drum welding part according to claim 1, wherein the pressing and moving device performs the crushing operation on a central part in the axial direction of the welding part along the axial direction. Pressing device. 5. A transport device (110) for transporting a plurality of drum body portions (200) continuously in a transport direction along a transport path, and disposed on both sides of the transport path, respectively. The two drum can welding part pressing devices (120-1, 120-2) according to any one of claims 1 to 3, and the drum can welding part pressing device, wherein the conveying device conveys the drum can welding part pressing device. A transfer device for mounting the drum can body to one of the drum can welding portion pressing devices and, at the same time, detaching the drum can body portion after flattening the welding portion from the other drum can welding portion pressing device and returning the same to the transport path. (130) A drum manufacturing apparatus, comprising: 6. The drum can manufacturing device according to claim 5, wherein the drum can welding part pressing device performs a crushing operation on a central part in the axial direction of the weld part along the axial direction of the drum body part. 7. A drum can welding part pressing device which is disposed on a pre-process side or a post-process side, and is located at both axial ends of the drum can body portion except for the central portion of the weld portion in the axial direction. 7. The drum can manufacturing according to claim 6, further comprising an end pressing device (301) for holding and pressing both ends of the welded portion along the thickness direction of the welded portion to perform a crushing operation of the both ends. apparatus. 8. A drum body portion of a cylindrical body formed by bending a steel plate, which is formed by welding both side ends of the steel plate extending in the axial direction of the cylindrical body to each other before the base plate and the top plate are attached. 200), a method for pressing a welded portion of a drum can that crushes the welded portion (201) at both end portions, wherein a central portion of the welded portion in the axial direction of the body portion of the drum can is rolled along the axial direction. , Crushing, pressing both ends of the welded portion located at both ends in the axial direction of the drum body portion excluding the central portion along the thickness direction of the welded portion and pressing the both ends. A pressing method for a welded portion of a drum can, characterized in that a crushing operation is performed. 9. The method according to claim 8, wherein the crushing operation on the both ends is performed before the crushing operation on the central portion. 10. The method according to claim 8, wherein the crushing operation on the center portion is performed before the crushing operation on the both end portions.