JP6087156B2 - Manufacturing method and plate material of cylindrical member - Google Patents

Description

The present invention relates to a method and sheet for producing a cylindrical member with a supporting lifting device of the cylindrical member.

  Conventionally, for example, a metal ring manufactured by cutting a metal drum as a cylindrical member into a ring is known (see, for example, Patent Document 1). A plurality of metal rings are laminated to form a CVT metal belt. The metal drum as the cylindrical member is made of metal such as maraging steel, and is formed by bending a thin plate rectangular plate of 0.3 to 0.4 mm into a cylindrical shape, and pressing the side edges of the cylindrical plate member It is manufactured by welding both ends of the plate material while supporting and fixing.

JP 2005-279701 A

  When welding both ends of the plate material, if the both ends are relatively wide open, welding cannot be performed properly. If welding is not appropriate, the cylindrical member cannot be used as a product due to problems such as durability, and the yield deteriorates.

In view of the above points, and an object thereof is to provide a method and sheet material for producing a circular tubular member that can be suitably welded to both end portions of the plate material.

The cylindrical member manufacturing method of the present invention is a cylindrical member manufacturing method in which a plate member is bent and held by two pressing members, and both ends of the plate member are welded to manufacture the cylindrical member. Notch portions are provided at both ends of the edge, and the end portion side of the notch portion is a notched portion side inclined surface that is inclined so as to gradually approach the end portion as it goes outward. The protrusion is provided with a protrusion corresponding to the notch, the protrusion is provided with a protrusion-side inclined surface corresponding to the notch-side inclined surface, and the holding member is sandwiched between the holding members by the holding member. A bending step in which the force in the sandwiching direction is converted into a force in a direction in which both end portions of the plate approach each other due to the contact between the projecting side inclined surface and the notch-side inclined surface, and the plate is bent into a cylindrical shape. And a holding step of holding the plate material by the pressing member A welding step of welding both end portions of the plate material, and the holding step includes a step of moving the two pressing members so as to sandwich the plate material, and the sandwiched between the two pressing members. movement of the pressing member side edge of the two in contact with the contact portion of the plate material is characterized Rukoto such and a step of stopping.

  According to the manufacturing method of the present invention, a part of the force (pressing force) in the direction in which the pressing member sandwiches the cylindrical plate material (cylindrical member before welding) is the protrusion side inclined surface and the notch side inclined surface. Is converted into a force in a direction in which both ends of the plate approach each other. Therefore, in the manufacturing method of the present invention, it is possible to prevent the both ends of the plate material from being widely opened and to perform high-quality welding with a small bead width.

  The plate material for manufacturing the cylindrical member by the manufacturing method of the present invention includes notches at the side edges of both end portions, and gradually approaches the end portion toward the outer side in the plate width direction on the end side of the notch portion. It is provided with the notch part side inclined surface inclined so that it may do.

The figure which shows embodiment of the board | plate material which concerns on this invention. The longitudinal cross-sectional view of embodiment of the support apparatus of the cylindrical member of this invention, and the manufacturing method of a cylindrical member. BRIEF DESCRIPTION OF THE DRAWINGS The cross-sectional view of embodiment of the cylindrical member supporting apparatus of this invention, and the manufacturing method of a cylindrical member. The enlarged view which shows the state which the notch part of the board | plate material of this embodiment and the pressing member fitted.

  With reference to the drawings, a cylindrical member support device and a cylindrical member manufacturing method according to an embodiment of the present invention will be described. As shown in FIG. 1 (a), the plate material 1 of this embodiment is punched in a rectangular shape from an unillustrated original plate, and “plate material side engaging portions” are formed on the side edges of both end portions 1a and 1b. The notches 2 are respectively provided. As the original plate, a steel plate (for example, maraging steel, stainless steel, etc.) is used.

  The punched plate 1 is bent and bent by a bending machine or the like, and is rolled as shown in FIG. 1B to form a cylindrical plate 1, in other words, a C-shaped cylinder before welding. The shaped member 4 is used. This process corresponds to the bending process of the present invention. As shown in FIGS. 2 and 3, both side edges 1c, 1d of the plate member 1 are pressed and held (supported) so as to be sandwiched between the two pressing members 3, 3 '.

  The adjacent end portions 1a and 1b of the notch portion 2 of the plate 1 become a notch portion-side inclined surface 2a that is inclined so as to approach the end portions 1a and 1b that are gradually closer toward the outer side in the width direction of the plate member 1. (See FIG. 3 and FIG. 4). FIG. 4 shows an enlarged view of the portion A in FIG. 3 before welding.

  The pressing members 3, 3 ′ are provided with protrusions 5 serving as pressing member side engaging portions that are positioned at locations corresponding to the notches 2. The protrusion 5 is provided with a protrusion-side inclined surface 5a that is inclined so as to correspond to the notch-side inclined surface 2a.

  The first pressing member 3 located on the left side in FIGS. 2 and 3 is moved by the first linear motion member 7 located on the left side in FIGS. It has become. Further, the second pressing member 3b located on the right side is moved by a second linear motion member 7 'located on the right side made up of a hydraulic cylinder, a spring, etc. (not shown). The cylindrical member 4 is advanced and retracted together with the pressing members 3 and 3 ′ in the welding apparatus 6 by the linear motion members 7 ′ and 7 ′.

  The first linear motion member 7 not only moves the first pressing member 3 forward and backward, but also along the axis of the cylindrical member 4 with respect to the cylindrical member 4 via the first pressing member 3. Thus, a pressing force toward the second pressing member 3 ′ can be applied.

  The second linearly moving member 7 ′ not only advances and retracts the second pressing member 3 ′ but also the first linear member 4 ′ along the axis thereof with respect to the cylindrical member 4 via the second pressing member 3 ′. A pressing force toward the pressing member 3 can be applied.

  The pressing force by the second linear motion member 7 ′ is smaller than the pressing force by the first linear motion member 7. Therefore, the cylindrical member 4 is moved to the second pressing member 3 'side when the pressing force is applied by the two linear motion members 7, 7'.

  These linear motion members 7, 7 'correspond to the pressing means in the present invention. In the support device of this embodiment, each of the two pressing members 3 and 3 ′ is provided with the first and second linearly moving members 7 and 7 ′, but only one of them is provided. You may do it.

  When the pressing force is applied to the cylindrical member 4 from the two pressing members 3 and 3 ′ on the side of the pressing member 3 ′ on the side moved by the second linearly moving member 7 ′, the cylindrical member An abutting member 8 with which 4 side edges abut is disposed. The abutting member 8 may also be disposed on the first linear motion member 7 side.

  By these linear motion members 7 and 7 ′, a pressing force is applied to the cylindrical member 4 via the two pressing members 3 and 3 ′. The cylindrical member 4 is held (supported) by the two pressing members 3, 3 ′ by the pressing force from these linear moving members 7, 7 ′, while the second linear moving member 7 ′ side Until the edge 1d abuts against the abutting member 8, it is moved together with the two pressing members 3, 3 ′ toward the second linearly moving member 7 ′. These steps correspond to the holding step of the present invention.

  Since the support device of the present embodiment has such a configuration, when a pressing force in the direction of being sandwiched between the cylindrical members 4 by the pressing members 3 and 3 ′ is applied, a part of the pressing force is projected to the protrusion side. By the contact between the inclined surface 5a and the notch-side inclined surface 2a, the force is converted into a force in a direction in which both end portions 1a and 1b of the plate member 1 approach each other. Thereby, it can prevent that both ends 1a and 1b of the board | plate material 1 approach, and the both ends 1a and 1b of the board | plate material 1 open widely, and can perform high quality welding with a small bead width | variety.

  Further, since the side edge 1d of the cylindrical member 4 is in contact with the abutting member 8, it is possible to suppress the deviation of the support position of the cylindrical member 4 due to the clearance of the pressing members 3 and 3 ′. Can do.

  Even when at least one of the two linear motion members 7 and 7 ′ is provided with a spring member having an elastic force such as a spring, the cylindrical member 4 due to the clearance of the pressing members 3 and 3 ′ or the like. It is easy to suppress the occurrence of deviation of the support position.

  Further, when the movement of the pressing members 3 and 3 ′ is stopped when the side edge 1 d of the cylindrical member 4 is brought into contact with the contact member 8, an excessive pressing force is applied to the cylindrical member 4. Therefore, distortion or the like hardly occurs, and the quality of the manufactured cylindrical member can be further improved.

  Next, welding (welding process) of both end portions 1a and 1b of the plate 1 will be described with reference to FIGS. The cylindrical member 4 sandwiched between the pressing members 3 and 3 ′ is inserted into the welding device 6.

  The welding device 6 is provided with a welding torch 6a, and various types of welding such as arc welding such as MIG and TIG, plasma welding, laser welding, and other welding can be used.

  And the welding apparatus 6 welds and joins the both ends 1a and 1b of the board | plate material 1 with the welding torch 6a with the insertion of the cylindrical member 4 before welding, and the cylindrical member 4 is completed. This process corresponds to the welding process of the present invention. Here, when welding, the inside and the outside of the cylindrically curved plate 1 (cylindrical member 4 before welding) are filled with an inert gas such as argon gas.

  Further, when welding, a desired amount of argon gas or the like per unit time is blown to the welded portion of the cylindrical member 4 from the outside with a nozzle or the like not shown so as to intersect the central axis of the welding torch 6a. Yes.

  When welding, an arc, plasma, laser beam, or other energy body having a desired energy density hits the outside of the cylindrical member 4, so that the welded portion is separated into molten metal and metal vapor, and the molten metal portion A keyhole (elongated cavity) is formed at the center of the irradiated portion.

  During welding, a desired amount of argon gas or the like per unit time is sprayed on the welded portion by a nozzle or the like (not shown) so as to intersect the axis of the welding torch 6a, and the unit time is given inside the cylindrical member 4. By introducing a desired desired amount of argon gas or the like and filling the inside of the cylindrical member 4, it is possible to stabilize the behavior in which the keyhole swings in the direction perpendicular to the welding progress direction. Therefore, high quality welding with a small bead width can be performed.

  As shown in FIGS. 3 and 4, a U-shaped groove 3a is provided between the protrusions 5 and 5 of the pressing members 3 and 3 '. Thereby, when welding the both end portions 1a and 1b of the plate member 1, it is possible to appropriately weld the portions where the welding is started and the portions where the welding is finished without interfering with the pressing members 3 and 3 '.

  If a part of the pressing force of the pressing members 3 and 3 ′ can be converted into a force in a direction in which the end portions of the plate material 1 approach each other, a protrusion is provided on the plate material 1 and a depression is provided on the pressing members 3 and 3 ′. Also good.

  Further, if a part of the pressing force of the pressing members 3 and 3 ′ can be converted into a force in a direction in which the end portions of the plate member 1 approach each other, either the notched portion side inclined surface 2 a or the protruding portion side inclined surface 5 a is selected. One side may not be provided. In this case, the inclined surface of the present invention is provided only in one of the notch and the protrusion.

DESCRIPTION OF SYMBOLS 1 ... Plate material, 1a, 1b ... End part of plate material, 1c, 1d ... Side edge, 2 ... Notch part (plate material side engaging part), 2a ... Notch part side inclined surface, 3, 3 '... Holding member, 3a ... Groove, 4 ... cylindrical member, 5 ... projection (pressing member side engaging portion), 5a ... projection side inclined surface, 6 ... welding device, 6a ... welding torch, 7, 7 '... linear motion member, 8 ... Contact member.

Claims (2)

A method of manufacturing a cylindrical member by curving a plate material and holding it with two pressing members, and welding both ends of the plate material,
At both ends of the side edge of the plate material, a notch is provided,
The end portion side of the notch portion is a notch portion inclined surface that is inclined so as to gradually approach the end portion as it goes outward.
The pressing member is provided with a protrusion corresponding to the notch,
The protrusion is provided with a protrusion-side inclined surface that is inclined in correspondence with the notch-side inclined surface,
When the plate member is sandwiched by the pressing member, the force in the direction in which the pressing member is sandwiched causes the both end portions of the plate member to approach each other due to the contact between the projecting portion side inclined surface and the notch portion inclined surface. Converted into directional force,
A bending step of bending the plate material into a cylindrical shape;
A holding step of holding the plate member with the pressing member;
A welding step of welding both ends of the plate material,
The holding step includes a step of moving the two pressing members so as to apply a force to sandwich the plate material, and a side edge of the plate material sandwiched between the two pressing members abuts against the contact portion, And a step of stopping the movement of the pressing member. A plate material for producing a cylindrical member by the production method according to claim 1 ,
The side edges of both ends are provided with notches,
A plate material characterized in that the end portion side of the notch portion is a notched portion side inclined surface that is inclined so as to gradually approach the end portion as it goes outward in the plate material width direction.

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