JP2012157959A - Pipe cutter, pipe cutting system, and pipe cutting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe cutter, a pipe cutting system, and a pipe cutting method capable of accurately cutting a pipe in a short time.SOLUTION: A first cutter 100 which cuts a vessel 2 whose at least one end is opened includes a die 111 in which a die side shear blade 112 contacting with two points facing each other on the outer surface of the vessel 2 is formed, a punch 113 which is inserted into the vessel 2 through the opening of the vessel 2 and in which punch side shear blades 114 and 115 are formed and arranged at a side closer to the opening of the vessel 2 than the die side shear blade 112 so as to contact with the inner surface of the vessel 2, and a relative movement means 116 which makes the die 111 and the punch 113 move relative to each other. The relative movement means 116 makes the die 111 to perform one reciprocation movement relative to the punch 113 so that two points of an ear 3 of the vessel 2 are sheared by the die side shear blade 112 and the punch side shear blades 114 and 115.

Description

  The present invention relates to a cylinder cutting machine, a cylinder cutting system, and a cylinder cutting method.

Conventionally, methods such as cutting using a cutter or shearing using a press device or the like are known as methods for cutting a cylindrical body or the like. As an example of a method of cutting a cylindrical body, for example, Patent Document 1 discloses a method of cutting a flange of a bottomed cylindrical battery positive electrode can formed by drawing using a cutter. According to the method described in the patent document, the generation of burrs can be suppressed by cutting the flange portion of the battery positive electrode can using a cutter.
Patent Document 2 discloses cutting an ear portion of a battery can formed in a bottomed rectangular tube shape.

JP-A 61-27058 JP 2000-30673 A

  However, in the cutting method described in Patent Document 1, the cutter is rotated around the central axis of the battery positive electrode can, or the battery positive electrode can is rotated around the central axis with respect to the positioned cutter. Therefore, it takes time to cut the battery positive electrode can. In addition, when trying to cut the ear portion of the rectangular tube-shaped battery can described in Patent Document 2 by the cutting method described in Patent Document 1, position control between the rectangular tube and the cutter becomes complicated, and the cutting of the rectangular tube is performed. There is a possibility that a level difference occurs on the surface.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a cylinder cutting machine, a cylinder cutting system, and a cylinder cutting method that can accurately cut a cylinder in a short time. Is to provide.

In order to solve the above problems, the present invention proposes the following means.
The cylinder cutting machine of the present invention is a cylinder cutting machine that cuts a cylinder having at least one open end, and is formed with die-side shearing blade portions that are in contact with two opposing positions on the outer surface of the cylinder. A punch-side shearing blade portion that is inserted into the cylindrical body from one opening in the cylindrical body and is disposed closer to the one opening side than the die-side shearing blade portion and can contact the inner surface of the cylindrical body. And a relative moving means for relatively moving the formed die and the punch in the two opposing directions, the relative moving means reciprocating the die once with respect to the punch, It is a cylinder cutting machine characterized by shearing two places in the cylinder by a die side shear blade part and the punch side shear blade part, respectively.

  According to the present invention, since the relative moving means makes the relative movement of reciprocating the die once with respect to the punch, each of the two opposing portions in the cylinder is sheared, so that the cylinder can be cut accurately in a short time. Can do.

In addition, the cylindrical body is formed in a bottomed cylindrical shape, and the cylindrical cutting machine of the present invention can contact the outer surface of the bottom portion of the cylindrical body, and can move and position in the depth direction of the cylindrical body. It is preferable to further include a stopper and a pusher that can contact the inner surface of the bottom portion of the cylindrical body and presses the outer surface of the bottom portion against the stopper.
In this case, the cutting position in the cylinder to be cut can be determined by the outer dimension of the cylinder.

  The cylindrical cutting system of the present invention is a cylindrical cutting system that cuts a cylindrical body having at least one end opened, and is a cylindrical cutting machine of the present invention that shears two opposing portions of the cylindrical body. A cylinder cutting system comprising: a cutting machine; and a second cutting machine that is a cylindrical cutting machine of the present invention and shears two other parts orthogonal to the two parts.

  According to this invention, a cylinder can be accurately cut | disconnected over a perimeter with a 1st cutting machine and a 2nd cutting machine.

  The cylindrical body cutting method of the present invention is a cylindrical body cutting method for cutting a cylindrical body having at least one open end, wherein a first shearing step of shearing two opposing portions of the cylindrical body by reciprocating motions, A second shearing step for shearing two other locations orthogonal to the two locations by a reciprocating motion, and cutting the cylinder over the entire circumference by the first shearing step and the second shearing step. It is the cylinder cutting method characterized.

  According to the present invention, the cylinder can be cut over the entire circumference by a combination of simple operations.

In addition, the cylindrical body is opened in a rectangular shape, and in the first shearing step, two sides on the short side in the opening of the cylindrical body are respectively cut, and in the second shearing step, the cylindrical body is disposed after the first shearing step. It is preferable to cut two long sides of the body opening.
In this case, the difference between the shearing force required to cut the two sides on the short side and the shearing force required to cut the two sides on the long side can be reduced.

In the first shearing step and the second shearing step, a die is brought into contact with the outer surface of the cylindrical body, a punch is inserted into the cylindrical body from one opening of the cylindrical body, and the inner surface of the cylindrical body In addition, it is preferable to shear the cylindrical body by bringing a punch into contact with the one opening side of the die.
In this case, the direction of the burr generated after cutting the cylindrical body can be aligned with either the radially inner side or the radially outer side of the cylindrical body.

  According to the tubular body cutting machine, the tubular body cutting system, and the tubular body cutting method of the present invention, the tubular body can be accurately cut in a short time.

It is a front view which shows the structure of the cylindrical body cutting system of one Embodiment of this invention. It is a perspective view which shows the shape before the cutting | disconnection of the cylinder cut | disconnected by the cylinder cutting system. It is a figure which shows the structure of the 1st cutting machine in the cylinder cutting system, and is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is sectional drawing in the CC line of FIG. It is a perspective view which shows the die | dye in the same 1st cutting machine. It is a perspective view which shows the punch in the 1st cutting machine. It is a figure which shows the structure of the 2nd cutting machine in the cylinder cutting system, and is sectional drawing in the DD line | wire of FIG. It is sectional drawing in the EE line | wire of FIG. It is sectional drawing in the FF line of FIG. It is a perspective view which shows the die | dye in the same 2nd cutting machine. It is a perspective view which shows the punch in the 2nd cutting machine. It is a flowchart which shows the cylinder cutting method of this embodiment. It is a figure for demonstrating the operation | movement at the time of use of the said 1st cutting machine. It is a figure for demonstrating the operation | movement at the time of use of the said 1st cutting machine. It is a perspective view which shows the cylinder cut | disconnected by the same 1st cutting machine. It is a figure for demonstrating operation | movement at the time of use of the said 2nd cutting machine. It is a perspective view which shows the cylinder cut | disconnected by the said 2nd cutting machine, and the cover body fixed to a cylinder.

A cylinder cutting machine and a cylinder cutting system according to an embodiment of the present invention will be described. FIG. 1 is a front view showing the configuration of the cylindrical body cutting system of the present embodiment. FIG. 2 is a perspective view showing a shape before cutting of the cylinder cut by the cylinder cutting system.
The cylinder cutting system 1 of the present embodiment is a system that cuts a cylinder that is open at least at one end. Hereinafter, as an example of the cylinder to be cut, a bottomed cylinder formed by deep drawing, specifically, a dry battery container such as a lithium ion battery will be described.

  As shown in FIG. 2, the container 2 is formed in a bottomed rectangular tube shape that is deep-drawn using, for example, a metal plate as a material. Moreover, the container 2 has one end opened in a rectangular shape, and has a rectangular parallelepiped outer shape as a whole. The outer dimension in the depth direction of the container 2 immediately after the deep drawing process is larger than the designed outer dimension d1 of the container 2. As a result, a portion (hereinafter referred to as “ear portion 3”) that is distorted by deep drawing near the opening of the container 2 can be cut (trimmed) to flatten the opening end of the container 2.

  As shown in FIG. 1, the cylinder cutting system 1 includes two cylinder cutting machines (a first cutting machine 100 and a second cutting machine 200). In the cylindrical cutting system 1, the first cutting machine 100 cuts the two short sides 3 a in the opening of the container 2, and the second cutting machine 200 cuts the two long sides 3 b in the opening of the container 2, respectively. It is provided for cutting. Hereinafter, the structure of the 1st cutting machine 100 and the 2nd cutting machine 200 is demonstrated in order.

FIG. 3 is a diagram showing the configuration of the first cutting machine 100 in the cylindrical body cutting system 1, and is a cross-sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG. 5 is a cross-sectional view taken along the line CC of FIG.
As shown in FIGS. 3 to 5, the first cutting machine 100 includes a base 101 fixed on a floor or a work table, and a container support provided on the base 101 so as to be able to move relative to the base 101. 102, a die 111 fixed to the container support 102, a punch 113 fixed to the base 101, and relative movement means 116 that moves the container support 102 relative to the base 101.

As shown in FIGS. 4 and 5, the container support portion 102 includes a frame body 103 in which the container 2 is accommodated, and a stopper 104 provided on the upper portion of the frame body 103.
The frame 103 is formed in a rectangular tube shape opened in the vertical direction, and the inner size of the frame 103 is set to a size having a clearance that allows the container 2 to be taken in and out. In this embodiment, in order to accommodate the container 2 whose outer shape is a rectangular parallelepiped shape, the frame body 103 is formed with an opening having a substantially rectangular shape when the frame body 103 is viewed in plan view at the upper end. The container 2 is inserted into the frame 103 with the ear portion 3 on the bottom and the bottom on the top.

As shown in FIGS. 4 and 5, the stopper 104 has a contact portion 105 inserted into the frame body 103 from the upper opening of the frame body 103, and the contact portion 105 moves back and forth in the vertical direction of the frame body 103. Positioning means 106.
The contact portion 105 has a contact surface 105 a that can contact the outer surface 4 a of the bottom of the container 2 inserted into the frame body 103.

The positioning means 106 is connected to the contact portion 105, and moves a contact portion 105 in the vertical direction of the frame body 103, for example, a moving mechanism (not shown) having a servo motor, a lower end of the contact portion 105, and a die described later. An encoder (not shown) that measures the vertical distance from the side shearing blade portion 112 is provided.
The positioning means 106 enables the abutting portion 105 to advance and retreat in the depth direction of the container 2 accommodated in the frame 103, and positions and fixes the abutting portion 105 at an arbitrary position in the depth direction of the container 2. can do.

  The pusher 107 includes a tip member 108 that can contact the inner surface 4b of the bottom 4 of the container 2, a buffer member 108a connected to the tip member 108, and a shaft 109 that supports the buffer member 108a.

The tip member 108 is formed in a rod shape that is long in the long side direction when the frame 103 is viewed in plan.
The buffer member 108 a is disposed inside the frame body 103 and can be expanded and contracted in the vertical direction of the frame body 103, that is, in the depth direction of the container 2 inserted into the frame body 103, and the tip member 108 is attached to the upper side. It is a member to be energized. The buffer members 108a are attached to both ends of the tip member 108 in the longitudinal direction. In the present embodiment, a coil spring is employed as the buffer member 108a.

The shaft 109 is two rod-like members fixed to the lower ends of the two buffer members 108a, and is connected to the base 101 through a punch 113 described later. In the present embodiment, the shaft 109 is inserted into a substantially rectangular support 110 fixed to the punch 113, and the upper end of the shaft 109 protrudes from the upper end of the support 110. The support 110 is formed in a size that can be inserted into the container 2.
The shaft 109 is moved back and forth in the vertical direction by a servo motor (not shown). The tip member 108 can be moved up and down by moving the shaft 109 forward and backward.

  The pusher 107 supports the container 2 inserted into the frame 103 from below, and pushes up the container 2 until the outer surface 4 a of the bottom 4 of the container 2 contacts the contact surface 105 a of the contact part 105. As a result, the outer surface 4 a of the bottom 4 of the container 2 inserted into the frame 103 is always pressed against the contact portion 105 of the stopper 104.

  As shown in FIG. 3 and FIG. 4, the dies 111 are arranged at the lower end of the frame body 103 and are respectively provided at two short sides when the frame body 103 is viewed in plan. The dies 111 provided at two locations are formed in the same shape and the same size so as to face each other.

FIG. 6 is a perspective view showing the die 111 in the first cutting machine 100.
As shown in the figure, the die 111 is formed in a shape along the outer surface of the short side of the side surface of the container 2, and the die side shearing blade portion for cutting off the middle portion of the side wall on the short side by shearing. 112 is formed.

FIG. 7 is a perspective view showing the punch 113 in the first cutting machine 100.
As shown in FIGS. 4 and 7, the punch 113 is a substantially rectangular parallelepiped member having a lower end fixed to the base 101 and directed toward the inside of the frame body 103. Punch side shearing blade portions 114 and 115 having a slight clearance between the die 113 and the die side shearing blade portion 112 are formed on the upper portion of the punch 113.
As shown in FIG. 4, the punch-side shear blade portions 114 and 115 are inserted into the container 2 through the opening of the container 2 inserted into the frame body 103 and slightly from the position where the die-side shear blade portion 112 contacts. The inner surface of the container 2 on the opening side of the container 2 can be contacted.

  As shown in FIGS. 3 to 5, the relative moving means 116 includes a motor 117 that rotates the output shaft in one direction, an eccentric shaft 118 that is coupled to the output shaft of the motor 117, and the eccentric shaft 118 is slidable. A plate-like movable element 119 fitted to the movable element 119, a slider 120 connected to the movable element 119 and fixed to the container support 102, and a guide rail 121 fixed to the base 101 and slidably supported in one direction. And have.

The rotation operation of the motor 117 is controlled by a control unit (not shown), and the eccentric shaft 118 is rotated once per process.
The eccentric shaft 118 includes a main shaft 118b connected to the output shaft of the motor 117, and a disk-shaped eccentric 118a that is eccentric with respect to the rotation shaft of the main shaft 118b.
The mover 119 is a rectangular plate-like member in which a through hole 119a having substantially the same shape as the diameter of the eccentric 118a is formed, and the eccentric shaft 118 is inserted into the through hole 119a.

The slider 120 is a substantially plate-like member in which a rectangular through hole 120a into which the moving element 119 is slidably fitted is formed. In the direction in which the guide rail 121 extends when the first cutting machine 100 is viewed in plan (the direction indicated by the symbol P in FIG. 3), the inner dimension of the through hole 120a is substantially the same as the outer dimension of the moving element 119. In a direction orthogonal to the direction in which the guide rail 121 extends when the cutting machine 100 is viewed in plan (the direction indicated by the symbol Q in FIG. 3), the inner dimension of the through-hole 120a formed in the slider 120 is the outer dimension of the moving element 119. Bigger than.
The initial position of the slider 120 is set to a position where the upper portion of the punch 113 is within the opening of the container 2 inserted into the frame 103.

  When the eccentric shaft 118 rotates around the rotation shaft 118b, the mover 119 moves in parallel so as to draw a circle around the main shaft 118b in one direction. Furthermore, the slider 120 is pushed by the movable element 119 that moves in parallel, and the slider 120 reciprocates in one direction along the direction in which the guide rail 121 extends.

  As shown in FIG. 5, a pair of guide rails 121 are provided with the slider 120 interposed therebetween, and regulate the forward / backward direction of the slider 120 in one direction. Friction is reduced between the guide rail 121 and the slider 120 for the purpose of relatively moving the guide rail 121 and the slider 120 with a light force.

  As the slider 120 advances and retreats along the guide rail 121, the container support portion 102 fixed on the slider 120 also advances and retreats along the guide rail 121. The forward / backward movement distance of the slider 120 along the guide rail 121 is determined by the eccentric amount and diameter of the eccentric shaft 118. When the eccentric shaft 118 rotates once by the motor 117, the container support portion 102 moves from the initial position to one of the directions in which the guide rail 121 extends, and then moves beyond the initial position to the other in the direction in which the guide rail 121 extends. Return to the initial position.

Next, the configuration of the second cutting machine 200 will be described. FIG. 8 is a diagram showing the configuration of the second cutting machine 200 in the cylindrical body cutting system 1, and is a cross-sectional view taken along the line DD in FIG. FIG. 9 is a cross-sectional view taken along line EE in FIG. 10 is a cross-sectional view taken along line FF in FIG.
The second cutting machine 200 is a device that cuts the ear 3 (see FIG. 2) of the container 2 on the same principle as the first cutting machine 100. Specifically, the second cutting machine 200 is a long side of the ear 3 of the container 2. The two sides 3b (see FIG. 2) are cut. Hereinafter, the difference between the second cutting machine 200 and the first cutting machine 100 will be described. In addition, about the structure which has the function similar to the 1st cutting machine 100, description is abbreviate | omitted by attaching | subjecting the code | symbol which added the branch number "-2" to the code | symbol of the structure equivalent in the 1st cutting machine 100.

  As shown in FIGS. 8 to 10, the second cutting machine 200 includes a base 101-2 fixed on the floor or work table, a container support 202 provided on the base 101-2, and a container support. A die 211 fixed to 202, a punch 213 fixed to the base 101-2, and relative movement means 116-2 for moving the container support 202 relative to the base 101-2.

  The container support part 202 of the second cutting machine 200 has a frame body 203 arranged in a state where the orientation is shifted by 90 ° in a plan view with respect to the frame body 103 of the first cutting machine 100. The frame 203 has a cylindrical shape opened in the vertical direction, and the container 2 can be inserted therein. A die 211 having a shape different from that of the die 111 provided on the frame body 103 of the first cutting machine 100 is fixed to the lower end of the frame body 203.

FIG. 11 is a perspective view showing the die 211 in the second cutting machine 200.
As shown in FIGS. 9 and 11, the dies 211 are provided at two locations on the long side when the frame 203 is viewed from the bottom, which is the lower end of the frame 203. The two dies 211 are formed in the same shape and the same size as each other, and are opposed to each other. The die 211 is formed in a shape along the outer surface of the two sides 3b (see FIG. 2) on the long side of the ear portion 3 of the container 2 and the corner portion between the long side and the short side. A die side shearing blade 212 for shearing the long side and corner side walls of the ear 3 of the container is formed.

FIG. 12 is a perspective view showing the punch 213 in the second cutting machine 200.
As shown in FIG. 12, unlike the punch 113 of the first cutting machine 100, the punch 213 has punch-side shearing blade portions 214 and 215 on the long side when viewed in plan.

  Next, the cylindrical body cutting method according to an embodiment of the present invention will be described using the above-described cylindrical body cutting system 1 as an example. In addition, the cylinder cutting method of the present invention can be applied to other than the cylinder cutting system 1 described above. FIG. 13 is a flowchart showing the cylindrical body cutting method of the present embodiment. 14 and 15 are diagrams for explaining an operation when the first cutting machine 100 is used.

  When the cylindrical body cutting system 1 shown in FIG. 1 is used, as shown in FIG. 13, the first shearing step S1 for shearing the two sides 3a on the short side of the container 2 by the first cutting machine 100, and the second cutting machine The second shearing step S2 in which the two sides 3b on the long side of the container 2 are sheared by 200 is performed in this order.

In the first shearing step S1, first, the container 2 formed into a bottomed rectangular tube shape by a deep drawing apparatus (not shown) is conveyed to the first cutting machine 100 (see FIGS. 3 to 5) by a conveying means (not shown). . At this time, in the first cutting machine 100, the stopper 104 is moved to a position retracted from the upper opening of the frame 103, and the upper opening of the frame 103 is opened so that the container 2 can be inserted.
The container 2 conveyed to the first cutting machine 100 is inserted into the frame 103 from the upper end with the opening facing downward.

When the container 2 is inserted into the frame 103, the inner surface 4 b of the bottom 4 of the container 2 and the pusher 107 come into contact with each other, and the container 2 is supported by the pusher 107.
Thereafter, the contact portion 105 of the stopper 104 moves downward from the upper opening of the frame 103, and the contact surface 105a of the contact portion 105 contacts the outer surface 4a of the bottom portion 4 of the container 2 (see FIG. 4). The contact portion 105 is moved based on the distance measured by the encoder of the stopper 104 by a control mechanism (not shown). The outer surface 4a of the bottom 4 of the container 2 is pushed downward by the abutting surface 105a of the abutting portion 105, whereby the buffer member 108a is compressed. As a result, the bottom 4 of the container 2 is sandwiched between the contact portion 105 and the tip member 108. When the distance measured by the encoder coincides with the designed outer dimension d1 (see FIG. 2) of the container 2, the contact portion 105 stops, and the contact portion 105 is positioned in this state.

  Subsequently, the motor 117 is driven as much as the eccentric shaft 118 rotates once. As a result, the slider 120 moves back and forth in one cycle (one reciprocation) until it moves from the initial position and returns to the initial position (see FIGS. 14 and 15). At this time, the first cutting machine 100 brings the die 111 into contact with the outer surface of the container 2, and the punch-side shear blade portion 114, 115 (see FIG. 4). Thereby, the container 2 is sheared so that the burr on the side wall on the short side of the ear portion 3 of the container 2 becomes a burr facing the outside of the container 2.

When the slider 120 moves back and forth in one cycle, the side wall located on the two sides 3a on the short side of the ear portion 3 of the container 2 is moved by the punch 113 and the die 111 of the first cutting machine 100 as shown in FIG. Both are cut into a rectangular shape.
When the slider 120 returns to the initial position, the driving of the motor 117 is stopped and the positioning of the contact portion 105 of the stopper 104 is released. Further, the contact portion 105 moves to a position retracted from the upper opening of the frame 103 so that the container 2 can be taken out from the frame 103.

  In this way, in the first shearing step S1, two opposing locations in the container 2 can be sheared by reciprocal motion.

This completes the process by the first cutting machine 100 and proceeds to the process by the second cutting machine 200.
FIG. 17 is a diagram for explaining an operation when the second cutting machine 200 is used. FIG. 18 is a perspective view showing the container 2 cut by the second cutting machine 200 and the lid 5 fixed to the container 2.

  After the process by the first cutting machine 100 is completed, the container 2 (see FIG. 16) in which the two sides 3a on the short side of the ear part 3 are cut off by the conveying means (not shown) is the frame body 103 of the first cutting machine 100. It is pulled out from the upper opening. Furthermore, the container 2 is conveyed to the second cutting machine 200. In the second cutting machine 200, the contact portion 105-2 of the stopper 104-2 is moved to a position retracted from the upper opening of the frame 203. Thereby, the upper opening of the frame 203 is opened so that the container 2 can be inserted. As shown in FIG. 9, the container 2 conveyed to the second cutting machine 200 is inserted into the frame 203 from the upper end with the bottom 4 facing upward and the opening facing downward.

Thereafter, similarly to the first cutting machine 100, the motor 117-2 is driven, and the slider 120-2 is rotated once (one reciprocation), so that as shown in FIG. The two sides 3b on the long side of the ear part 3 of the container 2 are cut out together with the corners by the punch 213.
At this time, the relative movement between the die 211 and the punch 213 of the second cutting machine 200 is such that both end portions 213a of the punch 213 are in contact with the cut surface X (see FIG. 16) cut by the first cutting machine 100. Start with. Thereby, the cut surfaces X and Y (see FIG. 18) of the ear portion 3 cut by the first cutting machine 100 and the second cutting machine 200 are flush with each other.

  Similarly to the first cutting machine 100, the second cutting machine 200 has the die 211 in contact with the outer surface of the container 2, and the position slightly shifted to the opening side from the inner surface of the container 2 and the die side shearing blade portion 212. The punch side shearing blade portions 214 and 215 are applied to. Thereby, the burr | flash produced in the two sides 3b of the long side of the ear | edge part 3 of the container 2 turns into a burr | flash which faces the outer side of the container 2. FIG.

As described above, in the second shearing step S2, the other ears 3 orthogonal to the ears 3 cut out in the first shearing step S1 can be sheared by a reciprocating operation in one cycle.
By performing the first shearing step S1 and the second shearing step S2 in this order, the cut surface X cut in the first shearing step S1 and the cut in the second shearing step S2, as shown in FIG. The cut surface Y is flush with the entire circumference.

  In the container 2 from which the ears 3 are cut, for example, a predetermined object to be stored such as a power generation element of a lithium ion battery is accommodated, and as shown in FIG. 18, a lid 5 that seals the opening is fixed. Examples of a method for fixing the opening of the container 2 and the lid 5 include laser welding.

  As described above, according to the cylindrical cutting machine (first cutting machine 100, second cutting machine 200), the cylindrical cutting system 1, and the cylindrical cutting method according to the present embodiment, the punches 113 and 213 are used. The opposing side walls of the ear 3 of the container 2 can be sheared by operating the dies 111 and 211 for one cycle (one reciprocation). Thereby, a cylinder can be cut | disconnected accurately in a short time.

  Further, the contact portion 105 of the stoppers 104 and 104-2 contacts the outer surface 4a of the bottom portion 4 of the container 2, and the cutting position of the ear portion 3 of the container 2 is defined by the position of the contact portions 105 and 105-2. Therefore, the outer dimension of the container 2 is directly measured, and the container 2 is cut based on the outer dimension of the container 2. Thereby, the dimensional accuracy based on the outer side of the container 2 can be enhanced regardless of the plate thickness of the container 2.

  In addition, since the punch 213 provided in the second cutting machine 200 is formed so as to contact the cutting surface X of the container 2 cut by the first cutting machine 100, the cutting surface Y in the second cutting machine 200. Can be made flush with the cut surface X of the first cutting machine 100. In this case, there is no need to provide a position sensor or a step detecting means for making the cut surface X and the cut surface Y flush with each other, and the container 2 can be accurately cut with a simple configuration.

  The cylindrical cutting system 1 of the present embodiment also cuts the first cutting machine 100 that cuts the two sides 3a on the short side of the ear 3 of the container 2 and the two sides 3b on the long side of the container 2. Since the second cutting machine 200 is provided, position control for cutting the container 2 while rotating the container 2 is not required, and the ear portion 3 of the container 2 can be accurately cut with a simple structure.

  Further, in the first shearing step S1 and the second shearing step S2, the positional relationship between the dies 111, 211 and the punches 113, 213 is determined so that the burrs are directed to the outside of the container 2, so that they are accommodated in the container 2. The stored objects are not damaged by burrs. In particular, in the case of this embodiment, the lid 5 is welded to the opening of the container 2, so the burrs directed to the outside of the container 2 disappear by welding or the like, and the container 2 for removing the burrs is polished. A process becomes unnecessary.

(Modification)
Next, a modified example of the tubular body cutting machine, the tubular body cutting system, and the tubular body cutting method described in the above embodiment will be described.
In this modification, the point from which the 2nd cutting machine 200 cut | disconnects the container 2 by control different from the above-mentioned embodiment differs.
As shown in FIG. 16, the second cutting machine 200 of the present modified example has the length of the container 2 at the preliminary cutting position Ya positioned further on the opening side than the cutting surface Y on the two sides 3 b on the long side of the container 2. The two sides 3b on the side are respectively cut, and then the two sides 3b on the long side of the container 2 are cut on the cut surface Y, respectively.

In this modification, first, the stopper 104-2 of the second cutting machine 200 positions the contact portion 105-2 above the position described in the above embodiment. If a specific example is given, the position of the contact surface 105a-2 of the contact part 105-2 will be adjusted and positioned so that it may be 2 mm above the position demonstrated by the above-mentioned embodiment. In this case, the cutting position of the container 2 by the die 211 and the punch 213 is a preliminary cutting position Ya that is shifted to the opening side by 2 mm from the cutting surface Y.
In this state, the second cutting machine 200 first cuts the two sides 3a on the long side of the container 2 along the preliminary cutting position Ya.
Subsequently, the contact portion 105-2 is pushed down by 2 mm by the stopper 104-2, and the two sides 3b on the long side of the container 2 are sheared at the cut surface Y by the die 211 and the punch 213.

  In this modification, it has a two-stage shearing process in which the container 2 is sheared at the cut surface Y after the container 2 is sheared at the preliminary cutting position Ya. Thereby, generation | occurrence | production of the tensile stress in the corner of the container 2 in the vicinity of the cut surface Y can be reduced, and the cut surface of the container 2 can be made smooth.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, in the above-described embodiment, a bottomed cylindrical deep-drawn molded product is shown as an example of the cylindrical body, but the cutting target is not limited to such a molded product. For example, also when cutting a cylinder with both ends opened, the cylinder cutting machine, the cylinder cutting system, and the cylinder cutting method of the present invention can be applied.

  In the present invention, the cylindrical body is not limited to a cylinder, but includes a so-called square cylinder having a polygonal cross-sectional outline in the radial direction. Further, even in the case of a square cylinder having no radially opposing side wall, for example, a triangular cylinder, a pentagon, a heptagon, etc., by appropriately changing the design of the shape of the punch and die, A cutting system and a cylinder cutting method can be applied.

  Moreover, in the above-mentioned embodiment, although the example which cut | disconnects the ear | edge part of the container opened in the rectangular shape with two cylinder cutting machines was shown, the side wall which opposes a cross section hexagonal shape, an octagon, etc. isometric direction, for example In the case of two or more sets of square tubes, the same number of cylinder cutting machines as the number of opposing side wall sets can be provided to cut these cylinders over the entire circumference.

  Moreover, in the above-described embodiment, an example in which the container is cut so that the burr is directed to the outside of the container has been shown. However, in the case where it is necessary to make the burr face to the inside of the container, in the depth direction of the container What is necessary is just to reverse the positional relationship of a die | dye and a punch with the above-mentioned embodiment.

  In the above-described modification, the example in which the preliminary cutting position is set to the opening side by 2 mm from the cut surface is shown, but the distance between the preliminary cutting position and the cut surface is not limited to 2 mm.

DESCRIPTION OF SYMBOLS 1 System 2 Container 3 Ear | edge part 3a Two sides of short side 3b Two sides of long side 4 Bottom part 4a Outer surface 4b (bottom part) Inner surface 5 Lid 100 First cutting machine 101 Base 102 Container support part 103 Frame body 104 Stopper 105 Contact portion 105a Contact surface 106 Positioning means 107 Pusher 108 Tip member 109 Shaft 110 Support body 111 Die 112 Die-side shear blade portion 113 Punch 114 Punch-side shear blade portion 116 Relative movement means 117 Motor 118 Eccentric shaft 118a eccentric 118b spindle 119 mover 119a through hole 120 slider 120a through hole 121 guide rail 200 second cutting machine 202 container support part 203 frame 211 die 212 die side shear blade part 213 punch 214 punch side shear blade part X cut surface Y Cut surface S1 No. Shear process S2 second shearing step

Claims (6)

A cylinder cutting machine for cutting a cylinder having at least one end opened,
A die formed with die-side shearing blade portions that are in contact with two opposing locations of the outer surface of the cylindrical body;
A punch that is inserted into the cylinder from one opening in the cylinder and is disposed closer to the one opening than the die-side shearing blade and has a punch-side shearing blade that can contact the inner surface of the cylinder. When,
Relative movement means for relatively moving the die and the punch in the opposing direction of the two places;
With
The relative movement means comprises reciprocating the die once with respect to the punch, and shearing the two portions of the cylindrical body by the die side shearing blade part and the punch side shearing blade part, respectively. A cylinder cutting machine. The cylindrical body is formed in a bottomed cylindrical shape,
A stopper capable of contacting the outer surface of the bottom of the cylinder, movable in the depth direction of the cylinder, and positionable;
A pusher capable of contacting the inner surface of the bottom of the cylindrical body and pressing the outer surface of the bottom against the stopper;
The cylinder cutting machine according to claim 1, further comprising: A cylinder cutting system for cutting a cylinder having at least one end opened,
The first cutting machine according to claim 1 or 2, wherein the first cutting machine shears two opposing portions of the cylindrical body,
The cylindrical cutting machine according to claim 1 or 2, wherein a second cutting machine that shears the other two points orthogonal to the two points;
A cylindrical body cutting system comprising: A cylinder cutting method for cutting a cylinder having at least one end opened,
A first shearing step of shearing two opposing locations in the cylindrical body by reciprocation,
A second shearing step of shearing each of the other two locations orthogonal to the two locations by a reciprocating motion;
Have
A cylindrical cutting method, wherein the cylindrical body is cut over the entire circumference by the first shearing step and the second shearing step. The cylinder is opened in a rectangular shape,
In the first shearing step, each of the two sides on the short side in the opening of the cylindrical body is cut,
5. The cylinder cutting method according to claim 4, wherein, in the second shearing process, two long sides of the opening of the cylinder are respectively cut after the first shearing process.   In the first shearing step and the second shearing step, a die is brought into contact with the outer surface of the cylindrical body, a punch is inserted into the cylindrical body from one opening of the cylindrical body, and the inner surface of the cylindrical body and the 6. The cylindrical body cutting method according to claim 4, wherein the cylindrical body is sheared by bringing a punch into contact with the one opening side of the die.

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