JP4670082B2 - Manufacturing method of flanged damping steel bellows pipe by squeezing - Google Patents

Description

The present invention relates to a method for manufacturing a bellows pipe made of a vibration-damping steel plate with flange by squeezing , which can eliminate the influence of heat due to welding and can efficiently form a cylindrical body having a uniform thickness.

    Conventionally, damping steel plate pipes for preventing vibrations are known in fields such as housing, building equipment, and automobile-related industries. Such a damping steel plate pipe is composed of the first steel plate of the belt-like plate body that forms the outer layer pipe and the belt-like plate member that forms the inner layer pipe when the outer layer pipe and the inner layer pipe constituting the metal pipe are formed. The second steel plate is laminated and overlapped in substantially the same area, and a damping member having substantially the same area is sandwiched between the first steel plate and the second steel plate, and the first steel plate and the damping member. And a second steel plate are formed in a flat plate-shaped intermediate body, and both ends in the width direction are wound and attached to form a cylinder, and both ends in the cylinder width direction are welded. It is formed by adhering.

    However, such a three-layered damping steel plate pipe has a problem that the damping member of the intermediate element is melted by heat due to welding because both ends in the cylindrical width direction are fixed by welding. It has been pointed out that there are dangers such as welding defects caused by foreign matter due to contamination of the brazing material, and melting gas generated by heat from the damping member, which is inhaled by the operator.

    Therefore, as in Patent Document 1, when manufacturing the damping steel plate pipe D, the width dimension between the end portions 1b, 1b on the coupling side in the first steel plate 1 to be the inner layer pipe 1a is the outer layer pipe 2a. A non-laminated portion 5 is formed in which the first steel plate 1 to be the inner layer pipe 1a is in a non-contact state, which is shorter than the width between the end portions 2b, 2b on the coupling side of the second steel plate 2. Similarly, the non-laminated portion 5 where the damping member 3 is in a non-contact state is also formed in the width dimension between the coupling-side end portions 3a and 3a of the damping member 3. Then, a method is adopted in which only the joining end portions 2a and 2a of the second steel plate 2 to be the outer layer pipe 2a are fixed by welding 4, and the influence of heat at the time of pipe forming is removed. ing.

  JP-A-4-231180

    When forming a pipe, in order to provide a non-laminated portion where the steel plate or the damping member is in a non-contact state at the end on the coupling side, that is, in order not to be affected by heat, the steel plate or the damping member has a cutting portion. There is a problem in that it is necessary to provide the device, which is troublesome in production and cost cannot be reduced.

The present invention has been made under such circumstances, and solves the problem that the damping member is melted by heat, eliminates the influence of heat due to welding, and efficiently forms a uniform cylindrical body. It aims at the manufacturing method of the bellows pipe made from a damping steel plate with a flange by the drawing process which can be performed.

In order to solve such a problem, the present invention provides a resin member which is a flat plate damping member in the gap between the first steel plate of the belt-like plate body and the second steel plate of the belt-like plate body as described in claim 1. It was sandwiched, at the time of processing of the vibration damping steel plate each timber are stacked in three layers to each other,
When forming the three-layer damping steel plate as a cylindrical body, a cylindrical body is formed by squeezing so that the sandwiched resin member does not melt under the influence of heat from welding ,
The bottom part of the bottomed cylindrical body on one side of the cylindrical body is cut off, and the opening part including the ear part of the opening cylindrical body on the other side of the cylindrical body is cut off, and both ends of the cylindrical body are opened. Forming a cylinder,
Thereafter, a bellows pipe is formed by mounting a bellows hydraulic molding die on the outside of the simple cylinder or by mounting a roll mold on the outside and inside of the simple cylinder ,
A method for producing a bellows pipe made of a vibration-damped steel plate with a flange by squeezing, wherein the bellows pipe has a three-layer structure in which flanges are attached to outer peripheries of both ends .

[0009]
【The invention's effect】
According to the present invention, when manufacturing a bellows pipe made of a damping steel plate stacked in three layers, the three-layer damping steel plate is integrally squeezed without eliminating the influence of heat caused by welding and without melting the resin member. A cylindrical body having a bottomed cylindrical body on one side and an open cylindrical body on the other side is formed, the bottom of the bottomed cylindrical body on one side is cut off, and the ears of the open cylindrical body on the other side are included. According to the procedure of cutting off the opening, forming a simple cylinder with both ends of the cylinder open, and then applying a bellows tube to the simple cylinder and attaching flanges to the outer periphery of both ends of the bellows tube Because it is manufactured, it is possible to efficiently form a simple cylindrical body with a uniform wall thickness, and to eliminate the influence of heat caused by welding, and to control the vibration with three layers with flange by squeezing without melting the resin member. Steel plate bellows tube Can be manufactured.

Hereinafter, the best mode for carrying out the invention will be described in detail with reference to the drawings. FIGS. 1 to 3 are explanatory views showing a forming procedure of the damping steel plate pipe according to the present invention, FIG. 5 is a perspective view of the damping steel plate pipe according to the present invention, and FIG. 6 is FIGS. FIG.

The damping steel plate pipe 10 of the present invention is formed by a squeezing process such as a deep squeezing process or a squeezing process, which does not give the influence of heat by welding. In addition, the Example of this invention is demonstrated by deep drawing. As shown in FIGS. 1 to 3 , a resin member 13, which is a flat plate damping member, is sandwiched and overlapped in a gap between the flat plate-like first steel plate 11 and the flat plate-like second steel plate 12 ( 100 in FIG. 6 ) . ). The three-layer damping steel plate 14 may be a known commercially available one. The flat plate-like three-layer damping steel plate 14 is deep-drawn based on punches and dies ( 101 in FIG. 6 ).

The damping steel plate 14 that has been subjected to deep drawing is a cylindrical body 15 having a bottomed cylindrical body 15a on one side and an open cylindrical body 15b on the other side. As for the cylindrical body 15, the bottomed cylindrical body 15a is cut off on the one side, and the opening Y of the opened cylindrical body 15b is cut off ( 102 in FIG. 6 ). Then, a three-layer simple cylindrical body 16 having both ends opened is formed ( 103 in FIG. 6 ). Further, flanges 17 and 17 are fixed to both ends of the three-layer simple cylinder 16 ( 104 in FIG. 6 ). Note that the opening Y of the opening cylindrical body 15b may have a corner provided with an ear. Further, a single convex portion 16 a is formed at the center of the simple cylindrical body 16.

    Furthermore, it explains in detail concretely. The first steel plate 11 and the second steel plate 12 are preferably formed of metal members. In this embodiment, each of the first and second steel plates 11 and 12 is a stainless steel plate, for example, an austenitic stainless steel using a SUS304 steel plate as a base material. Made of steel plate. However, this base material may be ferritic stainless steel such as SUS430 steel. The flat steel plates of the first steel plate and the second steel plate are wound into respective pipes, and the width direction thereof is set to a desired predetermined width. In this embodiment, for example, an outer layer pipe Φ80 and The inner layer pipe Φ79 is assumed, and there are various lengths such as a long or short one. In this embodiment, the lengths of the outer layer pipe 12 and the inner layer pipe 11 are 500 mm, respectively. Is assumed. There are various plate thicknesses as described above, but in this embodiment, the outer layer pipe 12 and the inner layer pipe 11 are assumed to have a plate thickness of 0.3 t.

    The damping member is made of a synthetic resin member of the resin member 13 having damping action, and various members can be used. For example, an α-olefin copolymer is preferable. However, polyester resin, nylon resin, and the like can be appropriately selected. For example, examples of the thermoplastic resin include an olefin resin, an acrylic resin, a vinyl chloride resin, a nylon resin, and a polyester resin. Examples of the thermosetting resin include an epoxy resin, a thermosetting polyester resin, and a thermosetting acrylic resin.

    Instead of the resin member, a viscous rubber member having a damping action can be used. As rubber members, natural rubber (NR), isobrene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR), butyl rubber (IIR), ethylene propylene rubber (EPDM) as general rubber materials, NBR as special rubber materials (Nitrile rubber), chloroprene rubber (CR), acrylic rubber (ACM), epichlorohydrin rubber (CO or ECO), fluoro rubber (FKM), silicone rubber (Q), urethane rubber (U), chlorosulfonated polyethylene ( CSM) polysulfide rubber (T) or the like.

    Deep drawing is a processing method in which a metal plate is punched with a punch P, a die Q, a wrinkle presser R, etc. to form a seamless container with a bottom, and in the drawing process, the metal material falls to the center of a mandrel (mold). This is a processing method in which a roller (or spatula) is pressed against a glass while being closely fixed with a cup and is plastically deformed and gradually brought closer to a mold.

This damping steel plate pipe 10 is mainly used when a bellows is formed on the outer periphery of a three-layer simple cylinder 16. As the pipe forming apparatus, as shown in FIGS. 7 and 8 , a known pipe forming apparatus such as a bellows hydraulic forming method or a bellows roll forming method can be used. In the bellows hydraulic forming method, molding dies A and B are attached to the outside of the bellows material tube, liquid is injected into the material tube, a predetermined pressure is applied to the liquid, the material tube is expanded, and at the same time a press machine Compress and mold with. In the bellows roll forming method, roll molds C and D are mounted on the outside and inside of the bellows material pipe, and the roll mold is pressed against the material pipe.

    In this way, when the damping steel plate pipe 10 is manufactured, the steel plate in which the flat plate-like first steel material 11, the flat plate-like second steel material 12, and the resin member 13 that is a flat plate-like damping member are stacked, that is, the first steel material. A resin member 13 as a damping member is sandwiched in the gap between the steel material 11 and the second steel material 12, and the damping steel plate 14 stacked in three layers is deep-drawn, and one side is a bottomed cylindrical body 15a and the other side is After forming the cylindrical body that is the opening cylindrical body 15b that is the opening, the bottom X of the bottomed cylindrical body 15a is cut off, and the opening Y is cut off to form the simple cylindrical body 16 that is open at both ends. . Therefore, the problem that the damping member is melted by heat can be solved, the influence of heat caused by welding can be eliminated, and a cylindrical body having a uniform thickness can be efficiently formed.

    In this way, when forming a pipe, it becomes possible to eliminate the influence of heat due to welding, and it is necessary to provide a non-laminated portion (cutting portion) where the steel plate and the damping member are in a non-contact state at the end on the coupling side. Therefore, it is possible to reduce the cost because it is not time-consuming to manufacture. In addition, because it is a squeezing process that can efficiently form a cylindrical body with a uniform wall thickness, it is a forming stand in which steel strips that are slit to a predetermined width by an arc welding machine, etc. There is no need to bend and roll-form into an open pipe and weld both ends in the plate width direction. Further, the cylindrical body is also suitable as a short cylindrical body having about one protrusion.

    As described above, when the damping pipe is formed, a cylindrical body having a uniform wall thickness can be efficiently formed without being affected by heat due to welding.

It is explanatory drawing which shows the 1st of the formation procedure of the pipe made from a damping steel plate concerning this invention. It is explanatory drawing which shows the 2nd of the formation procedure of the pipe made from a damping steel plate concerning this invention. It is explanatory drawing which shows the 3rd of the formation procedure of the pipe made from a damping steel plate concerning this invention. It is explanatory drawing which shows the 4th of the formation procedure of the pipe made from a damping steel plate concerning this invention. It is a perspective view of the pipe made from a damping steel plate concerning this invention. FIG. 5 is a molding flow diagram of FIGS. 1 to 4. It is explanatory drawing which shows the 1st of the bellows hydraulic forming method. It is explanatory drawing which shows the 2nd of the bellows hydraulic forming method. It is explanatory drawing which shows a bellows roll shaping | molding method. It is a principal part expanded sectional view which shows an example of the conventional pipe made from a damping steel plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Damping steel plate pipe 11 1st steel plate 12 2nd steel plate 13 Resin member 14 Damping steel plate 15 Cylindrical body 15a Bottomed cylindrical body 15b Opening cylindrical body 16 Simple cylindrical body X Bottom part Y Opening part

Claims (1)

And it sandwiched the resin member is a plate-shaped damping member in the gap between the second steel sheet of the first steel plate and strip-shaped plate member of the strip-shaped plate member, during the processing of the vibration damping steel plate each timber are stacked in three layers one another ,
When forming the three-layer damping steel plate as a cylindrical body, a cylindrical body is formed by squeezing so that the sandwiched resin member does not melt under the influence of heat from welding ,
The bottom part of the bottomed cylindrical body on one side of the cylindrical body is cut off, and the opening part including the ear part of the opening cylindrical body on the other side of the cylindrical body is cut off, and both ends of the cylindrical body are opened. Forming a cylinder,
Thereafter, a bellows pipe is formed by mounting a bellows hydraulic molding die on the outside of the simple cylinder or by mounting a roll mold on the outside and inside of the simple cylinder ,
A method for producing a bellows pipe made of a vibration-damped steel plate with a flange by squeezing, wherein the bellows pipe has a three-layer structure in which flanges are attached to outer peripheries of both ends .

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