KR100888698B1 - Apparatus for making a clad pipe and clad pipe - Google Patents

Abstract

A manufacturing device of a clad pipe and a clad pipe using the same are provided to reduce manufacturing cost by coating the exterior of a steel pipe with metal sheet made of stainless, copper or brass in order not to be easily rusted with moisture and air. A manufacturing device of a clad pipe comprises: a winding roller(10) in which a metal sheet(MS) is wound; a guide roller(20) which adheres closely to the floor side of the metal sheet which is unwound from the roller; a transferring roller(30) transferring a steel pipe(SP); a molding die(40) coating the metal sheet at the outer circumference of the steel pipe; a seam welding machine(50) welding both ends of the coated thin metal sheet; a polishing unit(60) polishing the welding part; and a cutting unit(70) cutting the clad pipe in the regular length unit.

Description

Apparatus for manufacturing a coated pipe and a coated pipe manufactured using the same {Apparatus for making a clad pipe and clad pipe}

The present invention relates to a coating pipe manufacturing apparatus and a coating pipe manufactured using the same, and in particular, by coating a metal sheet on the outer surface of the steel pipe used for the interior of a building or a guardrail of a road, not only to improve corrosion resistance but also to aesthetics. It is related with the coating pipe manufacturing apparatus which can be improved.

In general, the pipe is installed in the interior and exterior of the building to be used for the interior and piping of the building or as a component of the guardrail for inhibiting the entry of pedestrians or vehicles in places such as sidewalks and roadways.

Pipes used for this purpose are made of strong metal such as steel to resist external shocks. When the pipe is made of steel in this way, it is excellent in strength and is not easily broken by external force, but there is a problem in that rust is easily generated by reacting with moisture or air applied from the surroundings, and corrosion resistance is significantly reduced. The rust-produced pipes as described above not only impair the structural stability of the entire structure, but also include a risk of causing a safety accident, and also have a problem of impairing aesthetics.

Due to the problems described above, these days, the steel pipe is made of steel to prevent corrosion and anticorrosive paint, or to produce steel pipe using stainless steel instead of steel from the beginning.

However, in the case of painting on the outer surface of the steel pipe made of steel, the painted paint is easily peeled off, which not only damages the aesthetics but also increases the management cost by repainting again. Due to the higher price of stainless steel itself than steel, there is a problem in that the cost of manufacturing a pipe is increased.

The present invention has been made to solve the above-mentioned problems of the prior art, and has excellent visual aesthetics on the outer circumferential surface of the steel pipe, and also improves corrosion resistance by coating a metal sheet that does not easily react with moisture or air. An object of the present invention is to provide a coated pipe manufacturing apparatus capable of producing a pipe with improved aesthetics and a coated pipe manufactured using the same.

Apparatus for producing coated pipe according to the present invention for solving the above problems is a guide roller for guiding the metal thin plate is in close contact with the bottom surface of the metal thin plate wound and the metal plate released from the winding roller, and the steel pipe A feed roller for transferring, a forming die for covering the steel pipe into which the steel pipe and the metal thin plate are drawn and drawn on the outer circumferential surface of the steel pipe, and a seam for welding both ends of the metal plate coated on the steel pipe to be drawn out from the forming die. (Seam) A welder, polishing means for polishing a welded portion of a metal sheet welded at both ends by the seam welder, and a steel pipe coated with a metal sheet polished at both ends by the polishing means, is a predetermined length unit. It consists of cutting means for cutting into.

In addition, the apparatus for producing coated pipe according to the present invention is a guiding roller in which a metal sheet is wound, a guide roller which is brought into close contact with the bottom surface of the metal sheet released from the winding roller, and guides the metal sheet, and a conveying roller for conveying a steel pipe. And a forming die in which the steel pipe and the metal thin plate are drawn in and covering the drawn metal thin plate on the outer circumferential surface of the steel pipe, and having a welding hole formed at an upper end thereof, and both ends of the metal plate coated on the steel pipe through the welding hole of the forming die. Plasma welding machine for welding the steel, Polishing means for polishing the welded portion of the metal foil welded at both ends by the plasma welding machine, and steel pipe coated with the metal thin plate polished at both ends by the polishing means It may be composed of a cutting means for cutting to a predetermined length unit.

Then, the metal thin plate used in the coated pipe manufacturing apparatus according to the present invention configured as described above is made of any one selected from stainless steel, copper or brass.

The coated pipe manufacturing apparatus according to the present invention configured as described above is coated with a metal sheet on the steel pipe and then welded with a seam welder or a plasma welder, so that the beauty of the steel pipe can be made beautiful at low cost. There is an advantage.

In addition, since the metal sheet is made of one selected from stainless steel, copper or brass, the steel pipe made of steel has an advantage of improving corrosion resistance by minimizing contact with external moisture or air.

Hereinafter, with reference to the accompanying drawings an embodiment of the coated pipe manufacturing apparatus according to the present invention and the coated pipe manufactured using the same will be described in detail.

1 is a view showing an embodiment of the coating pipe manufacturing apparatus according to the present invention, Figure 2 is a view showing the appearance of the forming die used in the coating pipe manufacturing apparatus of Figure 1, (a) is a perspective view of the forming die (B) is AA 'sectional drawing of the molding die shown to (a), (c) is a partial cutaway view of a molding die.

Apparatus for manufacturing coated pipe according to the present invention is used to manufacture pipes used for guardrails in places such as interiors of buildings, sidewalks and roadways, and winding rollers 10 in which metal sheets (MS) are wound. And, the guide roller 20 for guiding the metal thin plate (MS), the conveying roller 30 for transferring the steel pipe (Steel Pipe, SP), and the metal thin plate (MS) to cover the steel pipe (SP) Forming die 40, a seam welder 50 for welding both ends of the metal thin plate MS, polishing means 60 for polishing a welded portion of the metal thin plate MS, and a metal thin plate (MS) is composed of a cutting means 70 for cutting the steel pipe (SP, steel pipe coated with a metal thin plate is referred to as "coated pipe" in the detailed description below).

The metal thin plate MS is made of one selected from stainless steel, copper or brass to minimize corrosion of the steel pipe SP by minimizing external moisture or air from contacting the steel pipe SP. Improve your aesthetics.

In the winding roller 10, the metal thin plate MS is wound around the outer circumferential surface a plurality of times, and the wound metal thin plate MS is released in the same direction as the traveling direction of the steel pipe SP.

The guide roller 20 is in close contact with the bottom surface of the metal thin plate (MS) released from the winding roller 10, so that the metal thin plate (MS) can be in contact with the lower side of the outer peripheral surface of the steel pipe (SP). At the same time, the metal sheet MS can be moved toward the forming die 40.

The feed roller 30 is in contact with the upper outer circumferential surface of the steel pipe (SP) and the upper roller 32 is formed in the center of the outer circumferential surface (not shown) and the lower side of the upper roller 32 It is disposed and consists of a lower roller 34 formed with a groove (not shown) in the center of the outer circumferential surface to rotate in contact with the lower outer circumferential surface of the steel pipe (SP). The feed roller 30 configured as described above provides a feed force to the steel pipe SP so that the steel pipe SP is continuously formed in the forming die 40, the seam welder 50, the grinding means 60 and the cutting means. To be transferred to the means 70 or the like.

The forming die 40 is the steel pipe (SP) and the metal thin plate (MS) is drawn in, and the coated metal thin plate (MS) on the outer peripheral surface of the steel pipe (SP), the front die 42, It is composed of a rear dice 44 formed integrally with the rear of the front dice 42.

The front die 42 has a pipe inlet 42a formed at the front end thereof so that the metal thin plate MS and the steel pipe SP are introduced therein, and a pipe outlet 42b communicating with the pipe inlet 42a at the rear end thereof. Is formed. In this case, a width between the pipe inlet 42a and the pipe outlet 42b becomes narrower from the upper end and both ends of the pipe inlet 42a to the upper end and both ends of the pipe outlet 42b, and the pipe inlet The lower end of the pipe outlet 42b at the lower end of 42a extends horizontally and linearly. Therefore, the metal thin plate MS introduced through the pipe inlet 42a of the front die 42 is gradually moved toward the upper end of the outer circumferential surface of the steel pipe SP while both ends move inside the front die 42.

Between the upper end of the pipe inlet 42a and the upper end of the pipe outlet 42b of the front die 42 configured as described above, press-fitting wedges 42-1 for pressing both ends of the metal thin plate MS are formed.

The press-fitting wedge 42-1 is configured in such a shape that its height and thickness decrease as it goes from the front end to the rear end thereof, and the overall shape thereof becomes a sharp needle like the rear, and the lower end into the molding die 40. It is formed to have a round curvature equal to the curvature of the outer circumferential surface of the steel pipe (SP) to be drawn.

The rear die 44 has a pipe discharge hole 44a which is in linear communication with the pipe outlet 42b of the front die 42, and is formed across the front and rear. That is, the diameter L1 of the pipe outlet 42b and the diameter L2 of the pipe discharge hole 44a are the same.

The seam welder 50 is to weld both ends of the metal thin plate (MS) coated on the steel pipe (SP) withdrawn from the forming die 40, the upper electrode roller 52 and the lower electrode roller ( 54).

The upper electrode roller 52 is in contact with both ends of the metal thin plate MS coated on the steel pipe SP to weld both ends thereof, and the lower electrode roller 54 has a recess (not shown) in the center of the outer circumferential surface thereof. Is formed to contact the lower outer circumferential surface of the steel pipe (SP) coated with the metal thin plate (MS). In addition to this, a detailed description of the seam welder 50 will be omitted since it is well known in the related art.

The polishing means (60) is to polish a welded portion of the metal thin plate (MS) welded at both ends by the seam welder (50), and is supported and rotated on the lower side of the coated pipe moving path (62). ), And the abrasive stone 64 is installed above the support roller 62 so as to be movable.

The support roller 62 is provided with a recess (not shown) in the center of the outer circumferential surface so that the recess is in contact with the lower circumferential surface of the covering pipe. That is, about half of the outer circumferential surface of the covering pipe is inserted into contact with the concave groove of the support roller 62.

The abrasive stone 64 is formed in a cylindrical shape and is connected to a motor (not shown) to rotate by receiving the rotational force of the motor.

The cutting means 70 is to cut the covering pipe by a predetermined length unit, a power motor 72 for rotating the rotary shaft 72a by receiving power, and one side of the cutting pipe 70 to the rotary shaft 72a of the power motor 72. Rotating main body 74 which is connected to the belt 72b, rotates and passes through the coating pipe, and is installed on the other side of the rotating main body 74 so as to be rotated at a predetermined angle toward the coating pipe so as to contact the coating pipe at a predetermined length. It is composed of a plurality of circular blades 76 for cutting the coating pipe thereby. Therefore, when the rotating shaft 72a of the power motor 72 rotates, the rotating body 74 is rotated by the rotating force of the rotating shaft 72a, and the circular blade 76 connected to the rotating body 74 is likewise. Will rotate. Therefore, when the coating pipe is to pass through the rotating body 74 to cut the coating pipe, the circular blade 76 is covered by the circular blade 76 which rotates by rotating the circular blade 76 toward the coating pipe and making contact with the coating pipe. Allow the pipe to be cut.

On the other hand, the coating pipe manufacturing apparatus according to the present invention is not limited to that shown in Figures 1 to 2, it may be configured as shown in Figures 3 to 4.

Figure 3 is a view showing another embodiment of the coating pipe manufacturing apparatus according to the present invention, Figure 4 is a view showing the appearance of the forming die used in the coating pipe manufacturing apparatus of Figure 3, (a) is a perspective view of the forming die (B) is AA 'sectional drawing of the molding die shown to (a), (c) is a partial cutaway view of a molding die.

The coated pipe manufacturing apparatus shown in FIGS. 3 to 4 is not significantly different from the structure of the coated pipe manufacturing apparatus shown in FIGS. 1 to 2, and therefore only the configuration having the difference will be described here.

First, the coated pipe manufacturing apparatus illustrated in FIGS. 1 to 2 welds both ends of the metal thin plate MS coated on the steel pipe SP using a seam welder 50, but FIGS. 3 to 4. The coated pipe manufacturing apparatus illustrated in FIG. Uses a plasma welding machine 80 to weld both ends of the metal thin plate MS.

At this time, the forming die 40 is not significantly different from the overall configuration and shape of the forming die 40 shown in Figs. 1 to 2, if there is a difference, the welding hole 44b at the upper end of the rear die 44 It is formed.

Through the welding hole 44b of the rear die 44 thus formed, the plasma welding machine 80 blows a high temperature flame (plasma jet) toward the metal thin plate MS, and the metal is blown out by the high temperature flame. Both ends of the thin plate MS are welded.

On the other hand, the plasma welding machine (80) is well known in the art, so detailed description thereof will be omitted.
Since the coated pipe is manufactured by the coated pipe manufacturing apparatus as described above, the coated pipe according to the present invention is coated with a metal thin plate MS on the outer circumferential surface of the steel pipe SP, as shown in FIG. MS) is polished at both ends so that the surface of the coating pipe is smooth.

1 is a view showing an embodiment of a coating pipe manufacturing apparatus according to the present invention.

FIG. 2 is a view illustrating a molding die used in the apparatus for manufacturing the coated pipe of FIG. 1, (a) is a perspective view of a molding die, and (b) is a sectional view taken along line AA ′ of the molding die shown in (a). (c) is a partial cutaway view of the molding die.

Figure 3 shows another embodiment of the coating pipe manufacturing apparatus according to the present invention.

Figure 4 is a view showing the appearance of the forming die used in the apparatus for producing the coated pipe of Figure 3, (a) is a perspective view of the forming die, (b) is a cross-sectional view AA 'of the forming die shown in (a), (c) is a partial cutaway view of the molding die.
Figure 5 is a perspective view showing a state of the coated pipe produced using the coated pipe manufacturing apparatus according to the present invention.

<Explanation of symbols on main parts of the drawings>

MS: metal sheet SP: steel pipe

10: winding roller 20: guide roller

30: feed roller 32: upper roller

34: lower roller 40: molding die

42: forward dice 42a: pipe inlet

42b: pipe outlet 42-1: press-fit wedge

44: rear dice 44a: pipe outlet hole

44b: welding hole 50: seam welding machine

52: upper electrode roller 54: lower electrode roller

60: grinding means 62: support roller

64: abrasive stone 70: cutting means

72: power motor 72a: rotating shaft

72b: belt 74: rotating body

76: circular blade 80: plasma welding machine

Claims (8)

A winding roller 10 on which a metal thin plate MS is wound; A guide roller 20 in close contact with the bottom surface of the metal thin plate MS released from the winding roller 10 to guide the metal thin plate MS; A feed roller 30 for feeding the steel pipe SP; A forming die 40 into which the steel pipe SP and the metal thin plate MS are drawn, and which coats the drawn metal thin plate MS on the outer circumferential surface of the steel pipe SP; A seam welder (50) for welding both ends of the metal thin plate (MS) coated on the steel pipe (SP) withdrawn from the forming die (40); Polishing means (60) for polishing a welded portion of the metal sheet (MS) welded at both ends by the seam welder (50); And a cutting means (70) for cutting the coated pipe polished at both ends of the metal thin plate (MS) by a predetermined length unit by the polishing means (60). A winding roller 10 on which a metal thin plate MS is wound; A guide roller 20 in close contact with the bottom surface of the metal thin plate MS released from the winding roller 10 to guide the metal thin plate MS; A feed roller 30 for feeding the steel pipe SP; The steel pipe (SP) and the metal thin plate (MS) is introduced, the metal die (MS) is coated on the outer circumferential surface of the steel pipe (SP), the forming die 40 and the welding hole 44b is formed on the top ; A plasma welding machine (80) for welding both ends of the metal thin plate (MS) coated on the steel pipe (SP) through the welding hole (44b) of the forming die (40); Polishing means (60) for polishing a welded portion of the metal thin plate (MS) welded at both ends by the plasma welding machine (80); And a cutting means (70) for cutting the coated pipe polished at both ends of the metal thin plate (MS) by a predetermined length unit by the polishing means (60). The method according to claim 1, The molding die 40 is composed of a front dice 42, and a rear dice 44 formed integrally with the rear of the front dice 42, The front die 42 is formed with a pipe inlet 42a at the front end and a pipe outlet 42b communicating with the pipe inlet 42a at the rear end, and at the top and both ends of the pipe inlet 42a. The width of the pipe outlet 42b becomes narrower toward the upper end and both side ends, and press-fitting wedges pressurizing both ends of the metal thin plate MS between the upper end of the pipe inlet 42a and the upper end of the pipe outlet 42b. (42-1) is formed, The rear die 44 is coated pipe manufacturing apparatus, characterized in that the pipe outlet hole (44a) is formed in linear communication with the pipe outlet (42b). The method according to claim 2, The molding die 40 is composed of a front dice 42, and a rear dice 44 formed integrally with the rear of the front dice 42, The front die 42 is formed with a pipe inlet 42a at the front end and a pipe outlet 42b communicating with the pipe inlet 42a at the rear end, and at the top and both ends of the pipe inlet 42a. The width of the pipe outlet 42b is narrowed toward the upper end and both side ends, and between the upper end of the pipe inlet 42a and the upper end of the pipe outlet 42b, press-fitting wedges for pressing both ends of the metal thin plate MS ( 42-1) is formed, The rear die 44 has a pipe discharge hole (44a) is formed in linear communication with the pipe outlet (42b), the coating pipe manufacturing apparatus, characterized in that the welding hole (44b) is formed on the top. The method according to claim 1 or 2, The polishing means (60) includes a support roller (62) contacting a lower portion of the outer circumferential surface of the metal thin plate (MS) coated on the outer circumferential surface of the steel pipe (SP); Polished stone 64 is installed on the upper side of the support roller 62 so as to be movable up and down to polish both ends of the metal thin plate (MS) coated and welded to the steel pipe (SP); Device. The method according to claim 1 or 2, The cutting means 70 is a power motor 72 for rotating the rotary shaft 72a by receiving power; A rotation body 74 of which one side is connected to the rotation shaft 72a of the power motor 72 by a belt 72b to rotate and the cover pipe penetrates; A circular blade 76 which is installed on the other side of the rotating body 74 so as to be rotated at a predetermined angle toward the coating pipe and contacts the coating pipe at predetermined lengths to cut the coating pipe 76; Manufacturing equipment. The method according to claim 1 or 2, The metal thin plate (MS) is coated pipe manufacturing apparatus, characterized in that made of any one selected from stainless steel, copper or brass. The coated pipe manufactured by the apparatus according to any one of claims 1 to 4.

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