WO2016024702A1

WO2016024702A1 - Multi-tube manufacturing device and method for manufacturing multi-tube using same

Info

Publication number: WO2016024702A1
Application number: PCT/KR2015/005269
Authority: WO
Inventors: 장동석; 박종배
Original assignee: 동연스틸주식회사
Priority date: 2014-08-14
Filing date: 2015-05-27
Publication date: 2016-02-18
Also published as: KR101590021B1; US20170246670A1; SG11201610209PA

Abstract

The present invention relates to a multi-tube manufacturing device and a method for manufacturing a multi-tube using the same, wherein a header is fabricated by inserting an insertion pipe into a containing pipe and is extruded by a ram using a predetermined extrusion force, the header is heat-treated by a heat treatment unit, and the heat-treated header is drawn by a drawing unit using a predetermined drawing force so as to produce a multi-tube having a desired diameter such that a plurality of tubes are simultaneously coupled mechanically and metallurgically by means of relatively simple configuration and process, thereby producing a multi-tube economically.

Description

Multi pipe manufacturing apparatus and manufacturing method of multi pipe using the same

The present invention relates to a multi-pipe manufacturing apparatus and a method for manufacturing a multi-pipe using the same, and more particularly, to produce a multi-pipe economically by combining a plurality of pipes simultaneously and mechanically by a relatively simple configuration and process. The present invention relates to a multi-pipe manufacturing apparatus and a multi-pipe manufacturing method using the same.

Multi-layered steel pipes, including double steel pipes, have generally been manufactured by shrink fit method using a difference in adhesive or thermal expansion coefficient.

Such multi-layered steel pipes have recently been produced by metallurgical bonding (Metalurgrical Bonding) and mechanical (Mechanical Bonding) and thermal bonding (Thermal Bonding).

Double, mechanical coupling can be used for hydraulic molding, SRM rolling, etc. Double hydraulic molding is a method of generating a clamping force by using the plastic deformation of the inner tube and the elastic recovery of the appearance, SRM rolling is used for the production of SEAMLESS steel pipe It is a method for implementing a mechanical coupling.

Here, the hydraulic molding uses a hydroforming method of supplying a fluid such as gas or water to the inner tube, and expands the inner tube by hydraulic pressure to couple to the exterior, but the limitation of the hydroforming method is that the length of the manufactured product is limited. In addition, the mold production cost by size for the production of the multi-pipe is excessively increased, the required cost due to the supply and post-treatment of the working fluid is increased, the working time is increased and the process is complicated.

In addition, SRM rolling is a cumbersome to have a manufacturing facility for mass production when performing hot rolling using a roll (roll), and the process of making a mother pipe by inserting an inner tube into the exterior is also made smoothly due to the characteristics of the process There is a problem that cannot be supported.

The present invention has been invented to improve the above problems, a multi-pipe manufacturing apparatus and a method for producing a multi-pipe economically by combining a plurality of pipes simultaneously and mechanically metallurgical by a relatively simple configuration and process It is to provide a method for producing a multi-pipe.

In order to achieve the above object, the present invention is a RAM (RAM) for extruding the capillary (母管) produced by inserting at least one or more insertion pipes having different diameters in the receiving pipe with a constant compression force; A heat treatment unit for heat-treating the mother pipe extruded from the ram; And drawing out the mother tube passing through the heat treatment unit with a constant drawing force, and drawing the unit into a multi-tube having a desired diameter.

Here, the compressive force and the pull force is characterized in that the same.

In this case, an outer circumferential surface of the outermost insertion pipe of the at least one insertion pipe may contact the inner circumferential surface of the accommodation pipe, and an outer circumferential surface of the next insertion pipe may contact the inner circumferential surface of the insertion pipe inserted into the accommodation pipe. .

The heat treatment unit may be a heat treatment furnace accommodating the mother pipe extruded from the ram, or a high frequency induction heating device disposed along a forming direction of the mother pipe extruded from the ram.

The high frequency induction heating apparatus includes a single frequency generator for high frequency induction heating and coupling of a receiving pipe and an insertion pipe of the same material forming the mother pipe, and a high frequency induction of each of the receiving pipe and the insertion pipe of different materials forming the mother pipe. And a plurality of frequency generators for heat coupling.

And, the capillary is characterized in that the heat treatment at 150 ℃ to 1350 ℃ by the heat treatment furnace or the high frequency induction heating apparatus.

The drawing unit may include a die having an extruded hole for extruding the multi-pipe from the ram to an outer diameter smaller than the capillary, a clamp for holding an end of the multi-pipe extruded from the die, and the clamp. It characterized in that it comprises a carrier for transporting the multi-tube with a constant pull force along the direction in which the multi-tube is extruded.

The extrusion hole may share a first end hole having a first diameter on a first surface of the die so as to face the ram, and a center same as a center of the first end hole and inside the die. A middle hole formed with a second diameter smaller than one diameter, and a second end hole formed with the second diameter on a second surface of the die which shares the same center as the center of the middle hole and faces the first surface; A first extrusion guide surface interconnecting the edges of the first end hole and the intermediate hole and gradually narrowing toward the carrier side, and interconnecting the edges of the intermediate hole and the second end hole and being constant toward the carrier side; And a second extrusion guide surface formed in a diameter, wherein the first diameter corresponds to an outer diameter of the mother tube, and the second diameter corresponds to an outer diameter of the multiple tube. It is done.

And, the extrusion guide surface is characterized in that the PVD coating layer (Duplex Physical Vapor Deposition Coating Layer) or DLC coating layer (Diamond-Like-Carbon Coating Layer) is formed.

The drawing unit further includes a mandrel protruding from the carrier to the ram side separately from the clamp and disposed at the center of the clamp and inserted into the multi-tube to maintain a constant internal diameter of the multi-tube. It is characterized by.

In addition, the outer peripheral surface of the mandrel is characterized in that a PVD coating layer (Duplex Physical Vapor Deposition Coating Layer) or DLC coating layer (Diamond-Like-Carbon Coating Layer) is formed.

The clamp may include a plurality of chucks mounted on the carrier and disposed radially to be spaced apart or in contact with an outer circumferential surface of the multi-pipe.

And, the receiving pipe and the insertion pipe is characterized in that made of the same or different materials.

And, the receiving pipe and the insertion pipe is characterized in that each of the electrical resistance welded steel pipe (ERW) or seamless steel pipe (SEAMLESS PIPE).

And, the insertion pipe is characterized in that one or at least one or more of stainless steel, aluminum, aluminum alloy, copper, copper alloy, nickel, nickel alloy.

And, the receiving pipe is characterized in that the carbon steel (carbon steel), cobalt-based alloy steel, aluminum, aluminum alloy, brass, high-manganese steel or a combination of at least one or more.

The accommodation pipe or the insertion pipe is characterized in that a plurality of reinforcing ribs are formed at equal intervals on the outer circumferential surface or the inner circumferential surface to form a hill and a valley in a linear shape along the longitudinal direction of the accommodation pipe or the insertion pipe.

The accommodation pipe or the insertion pipe may include a plurality of reinforcing ribs formed on the outer circumferential surface or the inner circumferential surface of the receiving pipe or the insertion pipe in an involute curve shape at equal intervals to form peaks and valleys. .

In addition, the multi-pipe manufacturing apparatus is provided only in the ram or the drawing unit, or is provided in the ram and the drawing unit are all operated to receive a driving force, and rotates the extruded capillary or the drawn multi-pipe in one direction. It characterized in that it further comprises a rotating actuator to.

On the other hand, the present invention comprises a first step of manufacturing a mother pipe by inserting at least one or more insertion pipes having different diameters in the receiving pipe; A second step of injecting the capillary into the ram and extruding with a constant compression force; A third step of injecting the mother tube extruded from the ram into a heat treatment unit and performing heat treatment; A fourth step of manufacturing a multi-tube having a desired diameter by gripping the end of the capillary tube passing through the heat treatment unit and drawing with a constant pulling force; It can provide a manufacturing method.

The outermost insertion pipe of the at least one insertion pipe may have an outer circumferential surface in contact with an inner circumferential surface of the accommodation pipe, and an outer circumferential surface of the next insertion pipe may contact with an inner circumferential surface of the insertion pipe inserted into the accommodation pipe. .

In this case, the third step may be a heat treatment at 150 ° C to 1350 ° C by a high-frequency induction heating apparatus disposed along an outer circumferential surface of the mother tube that is extruded from the ram or the mother tube extruded from the ram. It is characterized by.

According to the present invention having the above configuration, the following effects can be achieved.

First, the present invention is to insert the insertion pipe into the receiving pipe to produce a capillary extruded by a constant compressive force by the ram, heat treatment the capillary by the heat treatment unit, the drawing unit is a diameter desired by the drawing unit by a constant compression force and pull force By producing a multi-tube of the, it is possible to implement the improvement of formability, durability, corrosion resistance and strength in a relatively simple configuration, as well as to obtain a high-quality multi-pipe at a low cost.

In particular, the present invention implements a plurality of pipes and inserts through the hot forming of the heat treatment unit by a heat treatment furnace or high frequency induction heating while simultaneously implementing a mechanical coupling suitable for enhancing the corrosion resistance and rigidity of the accommodation pipe and the insertion pipe. The pipes can also be interconnected by metallurgical bonding, providing economically superior efficiency on site.

In addition, the present invention is the same as the drawing force of the drawing unit and the compression force of the ram equally different and each of the multiple pipes that are produced by using the mandrel while the grip of the clamping of the drawing unit, that is, the receiving pipe constituting the capillary and By precisely controlling the size of each of the at least one insertion pipe while maintaining a constant thickness, it is possible to manufacture a multi-pipe having excellent bonding force and excellent dimensional accuracy between layers.

1 is a conceptual diagram showing the overall configuration of a multi-pipe manufacturing apparatus according to an embodiment of the present invention

2 is an enlarged conceptual view of part A of FIG. 1;

3 is a cross-sectional conceptual view showing in detail the die structure of the drawing unit, which is the main part of the present invention, excluding the mother and multi-pipes in part A of FIG.

Figure 4 is a block diagram showing a method for manufacturing a multi-pipe using a multi-pipe manufacturing apparatus according to an embodiment of the present invention

5 and 6 are perspective views showing the structure of the receiving pipe or the insertion pipe for the production of multi-pipe to be manufactured by using a multi-pipe manufacturing apparatus according to various embodiments of the present invention

100 ... ram

200 ... heat treatment unit

300 ... drawing unit

310 ... die

310a ... first page

310b ... second scene

310h ... extrusion

311 ... First End Hole

312 ... second end hole

313a ... First extrusion guide surface

313b ... 2nd extrusion guide surface

314 ... Middle Hall

320 ... clamp

321 ... Chuck

330 ... carrier

340 Mandrel

400 ... receiving pipe

401, 402 ... reinforcement rib

500 ... insertion pipe

501, 502 ... reinforcement rib

600 ... Maternal

700 ... multiple tube

D1 ... first diameter

D2 ... 2nd diameter

S1 ... Step 1

S2 ... Step 2

S3 ... Step 3

S4 ... Step 4

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

In this specification, the embodiments are provided so that the disclosure of the present invention may be completed and the scope of the present invention may be completely provided to those skilled in the art.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

In addition, the same reference numerals throughout the specification refer to the same components, and the terminology (discussed) used herein is for the purpose of describing the embodiments are not intended to limit the invention.

As used herein, the singular forms "a", "an" and "the" include plural unless the context clearly dictates otherwise, and the elements and acts referred to as 'comprises' or 'do' not exclude the presence or addition of one or more other components and acts. .

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art.

In addition, the terms defined in the commonly used dictionary are not ideally or excessively interpreted unless they are defined.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

1 is a conceptual view showing the overall configuration of a multi-pipe manufacturing apparatus according to an embodiment of the present invention, Figure 2 is an enlarged conceptual view of the portion A of Figure 1, Figure 3 is a mother and multi-pipe in the portion A of Figure 1 Except for the schematic diagram showing the die structure of the drawing unit which is the main part of the present invention in detail.

As shown in the drawing, it can be seen that the structure includes a RAM 100, a RAM, a heat treatment unit 200, and a drawing unit 300.

The ram 100 extrudes the capillary tube 600, which is formed by inserting at least one or more insertion pipes 500 having different diameters into the receiving pipe 400 with a constant compression force (see the solid arrow in FIG. 1). will be.

The heat treatment unit 200 heat-treats the capillary tube 600 extruded from the ram 100 to perform a hot forming to form a metallurgical coupling between the receiving pipe 400 and the insertion pipe 500 constituting the capillary tube 600. To implement.

The drawing unit 300 draws the capillary tube 600 passing through the heat treatment unit 200 with a constant drawing force (see the dotted arrow in FIG. 1 below) to produce a multi-pipe 700 having a desired diameter. It is to implement a mechanical coupling between the receiving pipe 400 and the insertion pipe 500 constituting a).

Therefore, the present invention can implement the improvement of moldability, durability, corrosion resistance and strength in a relatively simple configuration, and can easily obtain a high quality multi-pipe 700 at a low cost.

In particular, the present invention implements a mechanical structure suitable for enhancing the corrosion resistance and rigidity of the plurality of pipes 400 and the insertion pipe 500 in a simple structure and at the same time heat treatment unit 200 by heat treatment furnace or high frequency induction heating, etc. Since the receiving pipe 400 and the insertion pipe 500 may be mutually coupled by metallurgical coupling through hot forming, the cost of the molding of the multi-pipe 700 may be reduced.

The present invention can be applied to the above embodiments, and of course, the following various embodiments are also applicable.

First, the compressive force of the ram 100 and the pull force of the drawing unit 300 must be equal to or slightly different from each other to produce a uniform high quality multi-pipe 700 without surface and mechanical defects.

In addition, the compression force of the ram 100 and the pulling force of the drawing unit 300 are appropriately sized with each other according to the design and the material and properties of the receiving pipe 400 and the insertion pipe 500 together with the design of the multi-pipe 700 to be manufactured. Of course, you can do it differently.

In addition, an outer circumferential surface of the outermost insertion pipe 500 of the at least one insertion pipe 500 is in contact with an inner circumferential surface of the accommodation pipe 400, and is connected to an inner circumferential surface of the insertion pipe 500 inserted into the accommodation pipe 400. The outer circumferential surface of the insertion pipe 500 is then contacted.

That is, in this manner, as well as the structure in which the outer circumferential surface of the insertion pipe 500 is in contact with the double layer, that is, the inner circumferential surface of the receiving pipe 400, as well as having a plurality of triple, quadruple or more layers It is of course possible to produce multiple tubes.

Here, the accommodating pipe 400 and the insertion pipe 500 may be made of the same or different materials, respectively, using the same resistance wire welded steel pipe (ERW) or seamless steel pipe (SEAMLESS PIPE), such as the parent pipe 600 and the multi-pipe 700 can be produced.

At this time, the insertion pipe 500 may be manufactured by combining one or at least one of stainless steel, aluminum, aluminum alloy, copper, copper alloy, nickel, nickel alloy.

In addition, the accommodation pipe 400 may be manufactured by combining one or at least one of carbon steel, cobalt-based alloy steel, aluminum, aluminum alloy, brass, high manganese steel.

On the other hand, the heat treatment unit 200 may be a high-frequency induction heating device disposed along the forming direction of the heat treatment furnace for receiving the mother tube 600 extruded from the ram 100 or the mother tube 600 extruded from the ram 100, , The capillary 600 is hot formed by heat treatment at 150 ℃ to 1350 ℃ by the above-described heat treatment furnace or high frequency induction heating apparatus.

At this time, when the heat treatment unit 200 is a high frequency induction heating apparatus, if the receiving pipe 400 and the insertion pipe 500 forming the mother tube 600 are the same material, a single frequency is generated to generate the accommodation pipe 400 and the insertion pipe. 500 may be further provided with a single frequency generator (not shown) to achieve a coupling according to the high frequency induction heating between each other.

In addition, when the heat treatment unit 200 is a high frequency induction heating apparatus, if the accommodation pipe 400 and the insertion pipe 500 forming the mother pipe 600 are different materials, the accommodation pipes of different materials forming the mother pipe 600 are different. Each of the 400 and the insertion pipe 500 layers may further include a plurality of frequency generators (not shown) for high frequency induction heating coupling to generate a plurality of different frequencies so that the coupling according to the high frequency induction heating may be performed. Could be

On the other hand, the drawing unit 300 is extruded from the die 310 and the die 310 is formed with an extrusion hole 310h for extruding the multi-pipe 700 to the outer diameter reduced from the ram 100, the mother tube 600 Clamp 320 for holding the end of the multi-pipe 700, and a carrier 330 having a clamp 320 and for transporting the multi-pipe 700 with a constant pull force along the direction in which the multi-pipe 700 is extruded It can be seen that it contains a structure.

2 and 3, the first and second end holes 311 and 312, the first and second extrusion guide surfaces 313a and 313b, and the middle hole 314 are described. It can be seen that the structure including the.

The first end hole 311 is formed with a first diameter D1 on the first surface 310a of the die 310 so as to face the ram 100.

The intermediate hole 314 is formed with a second diameter D2 that shares the same center as the center of the first end hole 311 and is smaller than the first diameter D1 in the die 310.

The second end hole 312 is formed to have a second diameter on the second surface 310b of the die 310 that shares the same center with the center of the middle hole 314 and faces the first surface 310a.

The first extrusion guide surface 313a interconnects the edges of the first end hole 311 and the middle hole 314 and is formed to gradually narrow toward the carrier 330.

The second extrusion guide surface 313b interconnects the edges of the intermediate hole 314 and the second end hole 312 and is formed to have a constant diameter toward the carrier 330 side.

Here, the first diameter D1 corresponds to the outer diameter of the parent tube 600, and the second diameter D2 corresponds to the outer diameter of the multi-pipe 700.

Accordingly, the capillary tube 600 passing through the first end hole 311 with a constant compressive force gradually decreases along the first extrusion guide surface 313a and passes from the intermediate hole 314 to the second extrusion guide surface 313b. It is discharged through the second end hole 312 to the multi-pipe 700 of the desired second diameter D2, and the carrier 330 moves while the clamp 320 is gripped by the multi-pipe 700. It will be molded.

It is preferable to form a Duplex Physical Vapor Deposition Coating (PVD) coating layer or a DLC coating layer (Diamond-Like-Carbon Coating Layer) on the first and second extrusion guide surfaces 313a and 313b.

The coating layer as described above is a technology for allowing the multi-pipe 700 to be molded while smoothly conveyed in one direction by increasing the lubricity when the mother pipe 600 is extruded with a constant compression force and the multi-pipe 700 is drawn with a constant pulling force It can be called a means.

In addition, in the present invention, by rounding the portion where the first extrusion guide surface 313a and the second extrusion guide surface 313b are connected based on the intermediate hole 314, the mother pipe 600 having the first diameter D1 is rounded. In the process of reducing the diameter to the multi-pipe 700 of the second diameter (D2) it will be possible to minimize the molding defects across the surface and the interior of the multi-pipe 700.

And, in the present invention, the carrier 330 is shown as a wheeled cart structure, but is not necessarily limited to such a structure.

The clamp 320 may include a plurality of chucks 321 mounted to the carrier 330 and disposed radially to be spaced or contacted with respect to the outer circumferential surface of the multi-pipe 700.

The carrier 330 is not particularly shown, but many other applications capable of precise displacement control, for example, a combination of an LM guide with a clamp 320 or a pinion that rotates in one direction by engaging a rack provided with the clamp 320. Of course, it is also possible to apply a deformation design.

In addition, the drawing unit 300 protrudes from the carrier 330 to the ram 100 side separately from the clamp 320 is disposed in the center of the clamp 320 and inserted into the multi-pipe 700 to the inner diameter of the multi-pipe 700 It may be further provided with a mandrel (340, mandrel, see Figs. 1 and 2) to maintain a constant.

On the outer circumferential surface of the mandrel 340, a PVD coating layer (Duplex Physical Vapor Deposition Coating Layer) or DLC coating layer (Diamond-Like-Carbon Coating Layer) is preferably formed.

In addition, although the present invention is not particularly shown, it is provided only in the ram 100, or provided in only the drawing unit 300, or provided in the ram 100 and the drawing unit 300 all receive the driving force to operate and extruded Of course, it may be further provided with a rotating actuator (not shown) for rotating the mother pipe 600 or the multiple pipe 700 is drawn in one direction.

The actuator for rotation is to enable a smoother and lesser force to draw the multi-pipe 700 of the capillary 600 extrusion and drawing unit 300 of the ram 100.

Hereinafter, a method of manufacturing a multi-pipe using a multi-pipe manufacturing apparatus according to an embodiment of the present invention will be briefly described with reference to FIG. 4.

First, at least one or more insertion pipes 500 having different diameters are inserted into the receiving pipes 400 to produce a capillary tube 600 (S1: first step).

Next, the mother tube 600 is injected into the ram 100 and extruded with a constant compressive force (S2: second step).

Thereafter, the mother tube 600 extruded from the ram 100 is introduced into the heat treatment unit 200 and heat-treated (S3: third step).

Subsequently, the drawing unit 300 grasps an end portion of the capillary tube 600 passing through the heat treatment unit 200 and draws the same at a predetermined drawing force to produce a multi-pipe 700 having a desired diameter (S4: fourth step). .

Here, the compressive force and the pulling force may be equal to each other, and may be appropriately different in size depending on the material and properties of the accommodation pipe 400 and the insertion pipe 500 together with the design of the multi-pipe 700 to be manufactured.

At this time, the outer circumferential surface of the outermost insertion pipe 500 of the at least one insertion pipe 500 is in contact with the inner circumferential surface of the accommodation pipe 400, and the inner circumferential surface of the insertion pipe 500 inserted into the accommodation pipe 400. The outer circumferential surface of the insertion pipe 500 is then contacted.

In addition, the third step (S3) is a high-frequency induction heating disposed along the outer circumferential surface of the heat treatment furnace for receiving the capillary tube 600 extruded from the ram 100 or the capillary tube 600 extruded from the ram 100 The capillary 600 is heat treated at 150 ° C. to 1350 ° C. by means of an apparatus.

Therefore, the present invention equals the pulling force of the drawing unit 300 and the compressive force of the ram 100 or the size of the drawing unit 300 and different from each other depending on the material of the receiving pipe 400 and the insertion pipe 500 and It is possible to draw the multi-pipe 700 using the mandrel 340 while holding the multi-pipe 700 with the clamp 320 accurately.

In addition, the present invention, each layer by precisely dimensional control while maintaining a constant thickness of each layer of each of the multi-pipe 700, that is, each of the receiving pipe 400 and at least one insertion pipe 500 constituting the parent tube 600 It is possible to produce a multi-pipe 700 is excellent in the bonding force between the excellent dimensional accuracy.

Thereafter, the operator may further perform a calibration and chamfering process of the manufactured multi-pipe 700, and may further perform an inspection process for inspecting defects on the outer surface of the multi-pipe 700.

On the other hand, in manufacturing the multi-pipe 700 through the manufacturing method as described above, in order to further increase the structural strength along the longitudinal direction of the multi-pipe 700, the receiving pipe 400 of the structure as shown in Figs. And insertion pipe 500 may be utilized.

That is, the receiving pipe 400 or the insertion pipe 500 has a plurality of reinforcing ribs that form a hill and a valley in a straight line along the longitudinal direction of the accommodation pipe 400 or the insertion pipe 500 on the outer peripheral surface or the inner peripheral surface as shown in FIG. 401 and 501 may be formed at equal intervals.

Therefore, in FIG. 5, when the pipe on the left side is the insertion pipe 500 and the pipe on the right side is the accommodation pipe 400, the reinforcement rib 501 of the outer circumferential surface of the insertion pipe 500 is the reinforcement rib of the inner circumferential surface of the accommodation pipe 400. After being guided and engaged in a straight line between the 401 and the neighboring reinforcing ribs 401 to be smoothly inserted, it may be manufactured from the mother tube 600 into the multi-pipe 700 by mechanical coupling and metallurgical coupling.

In addition, the accommodation pipe 400 or the insertion pipe 500 has a plurality of hills and valleys in an involute curve shape along the longitudinal direction of the accommodation pipe 400 or the insertion pipe 500 on the outer circumferential surface or the inner circumferential surface as shown in FIG. 6. The reinforcing ribs 402 and 502 may be formed at equal intervals.

Therefore, in FIG. 6, when the pipe on the left side is the insertion pipe 500 and the pipe on the right side is the accommodation pipe 400, the reinforcement rib 501 of the outer circumferential surface of the insertion pipe 500 is the reinforcement rib of the inner circumferential surface of the accommodation pipe 400. While rotating between the 401 and the neighboring reinforcing ribs 401, that is, guided and engaged smoothly inserted according to the operation of the above-described rotary actuator, the multi-pipe ( 700).

As described above, the present invention provides a multi-pipe manufacturing apparatus and a method of manufacturing a multi-pipe using the same, by which a plurality of pipes can be simultaneously mechanically and metallurgically combined by a relatively simple configuration and process to produce a multi-pipe economically. It can be seen that the basic technical idea.

In addition, many modifications and applications are possible to those skilled in the art within the scope of the basic technical idea of the present invention.

Claims

RAM for inserting at least one insertion pipe having a different diameter into the receiving pipe extruded by a constant compression force the capillary (母管);

A heat treatment unit for heat-treating the mother pipe extruded from the ram; And

And a drawing unit which draws the mother tube passing through the heat treatment unit with a constant drawing force, and a drawing unit into a multi-tube having a desired diameter.
The method according to claim 1,

The compression force and the pull force is a multi-pipe manufacturing apparatus, characterized in that the same or different from each other.
The method according to claim 1,

The outermost insert pipe of the at least one insert pipe has an outer circumferential surface in contact with an inner circumferential surface of the receiving pipe, and an outer circumferential surface of the next insert pipe is in contact with an inner circumferential surface of the insert pipe inserted into the receiving pipe. Manufacturing equipment.
The method according to claim 1,

The heat treatment unit,

A heat treatment furnace for receiving the capillary extruded from the ram,

And a high frequency induction heating device disposed along an outer circumferential surface of the mother pipe that is extruded from the ram.
The method according to claim 4,

The high frequency induction heating apparatus,

Single frequency generator for high frequency induction heating coupling of the receiving pipe and the insertion pipe of the same material forming the mother pipe,

And a plurality of frequency generators for high frequency induction heating coupling of the accommodation pipes and the insertion pipes of different materials forming the mother pipe.
The method according to claim 1,

The drawing unit,

A die having an extrusion hole for extruding the multi-pipe from the ram to a reduced outer diameter than the mother pipe,

A clamp for holding an end of the multi-pipe extruded from the die;

And a carrier having the clamp and conveying the multi-tubes with a constant pulling force along the direction in which the multi-tubes are extruded.
The method according to claim 6,

The extruded hole,

A first end hole formed at a first diameter on a first surface of the die to face the ram;

An intermediate hole formed with a second diameter smaller than the first diameter in the die and sharing a same center with the center of the first end hole;

A second end hole formed with the second diameter on a second surface of the die which shares the same center with the center of the intermediate hole and faces the first surface;

A first extrusion guide surface interconnecting edges of the first end hole and the intermediate hole and gradually narrowing toward the carrier;

A second extrusion guide surface interconnecting edges of the intermediate hole and the second end hole and formed to have a constant diameter toward the carrier side;

The first diameter corresponds to the outer diameter of the mother tube,

The second diameter is a multi-pipe manufacturing apparatus, characterized in that corresponding to the outer diameter of the multi-pipe.
The method according to claim 6,

The drawing unit,

The multi-tube manufacturing method further comprises a mandrel protruding from the carrier to the ram side separately from the clamp and disposed at the center of the clamp and inserted into the multi-tube to maintain a constant internal diameter of the multi-tube. Device.
The method according to claim 6,

The clamp is,

And a plurality of chucks mounted on the carrier and disposed radially to be spaced or contacted with respect to the outer circumferential surface of the multi-pipe.
The method according to claim 1,

The receiving pipe and the insertion pipe is a multi-pipe manufacturing apparatus, characterized in that made of the same or different materials.
The method according to claim 1,

The receiving pipe and the insertion pipe is a multi-pipe manufacturing apparatus, characterized in that each of the electrical resistance welded steel pipe (ERW) or seamless steel pipe (SEAMLESS PIPE).
The method according to claim 1,

The insertion pipe is

Multi-pipe manufacturing apparatus, characterized in that the stainless steel, aluminum, aluminum alloy, copper, copper alloy, nickel, nickel alloy, or a combination of at least one or more.
The method according to claim 1,

The receiving pipe,

Multi-pipe manufacturing apparatus, characterized in that the carbon steel, cobalt-based alloy steel, aluminum, aluminum alloy, brass, one or more combinations of at least one of high manganese steel.
The method according to claim 1,

The accommodation pipe or the insertion pipe,

And a plurality of reinforcing ribs forming a peak and a valley in a straight line along a longitudinal direction of the accommodation pipe or the insertion pipe on an outer circumferential surface or an inner circumferential surface at equal intervals.
The method according to claim 1,

The accommodation pipe or the insertion pipe,

And a plurality of reinforcing ribs formed on the outer circumferential surface or the inner circumferential surface of the receiving pipe or the insertion pipe in an involute curve shape at equal intervals to form peaks and valleys.
The method according to claim 1,

The multi-pipe manufacturing apparatus,

It is provided only in the ram or the drawing unit, and is provided in the ram and the drawing unit are all provided with a driving force to operate, and further comprising a rotating actuator for rotating in one direction the extruded capillary or the drawn multi-pipe Multi-pipe manufacturing apparatus characterized in.
The method according to claim 6,

The extrusion guide surface is a multi-pipe manufacturing apparatus, characterized in that the PVD coating layer (Duplex Physical Vapor Deposition Coating Layer) or DLC coating layer (Diamond-Like-Carbon Coating Layer) is formed.
The method according to claim 8,

The outer peripheral surface of the mandrel multi-pipe manufacturing apparatus, characterized in that the PVD coating layer (Duplex Physical Vapor Deposition Coating Layer) or DLC coating layer (Diamond-Like-Carbon Coating Layer) is formed.
A first step of inserting at least one or more insertion pipes having different diameters into the receiving pipe to produce a mother pipe;

A second step of injecting the capillary into the ram and extruding with a constant compression force;

A third step of injecting the mother tube extruded from the ram into a heat treatment unit and performing heat treatment;

And a fourth step of manufacturing a multi-pipe having a desired diameter by gripping the end of the capillary tube passing through the heat treatment unit and drawing with a constant pulling force.

The compressive force and the pull force is a method of manufacturing a multi-pipe using a multi-pipe manufacturing apparatus, characterized in that the same.
The method according to claim 19,

The outermost insert pipe of the at least one insert pipe has an outer circumferential surface in contact with an inner circumferential surface of the receiving pipe, and an outer circumferential surface of the next insert pipe is in contact with an inner circumferential surface of the insert pipe inserted into the receiving pipe. Method for producing a multi-pipe using a manufacturing apparatus.
The method according to claim 19,

The third step is

A heat treatment furnace for receiving the capillary extruded from the ram,

The method of manufacturing a multi-pipe using a multi-pipe manufacturing apparatus, characterized in that the heat pipe is heat-treated at 150 ℃ to 1350 ℃ by a high frequency induction heating device disposed along the outer circumferential surface of the capillary extruded from the ram.