WO2011083925A2 - Method and apparatus for manufacturing a corrugated steel pipe - Google Patents

Method and apparatus for manufacturing a corrugated steel pipe Download PDF

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Publication number
WO2011083925A2
WO2011083925A2 PCT/KR2010/009138 KR2010009138W WO2011083925A2 WO 2011083925 A2 WO2011083925 A2 WO 2011083925A2 KR 2010009138 W KR2010009138 W KR 2010009138W WO 2011083925 A2 WO2011083925 A2 WO 2011083925A2
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WO
WIPO (PCT)
Prior art keywords
wrinkle
steel sheet
roller
wrinkles
corrugated
Prior art date
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PCT/KR2010/009138
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French (fr)
Korean (ko)
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WO2011083925A3 (en
Inventor
김한곤
Original Assignee
Kim Han Gon
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Publication date
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Publication of WO2011083925A2 publication Critical patent/WO2011083925A2/en
Publication of WO2011083925A3 publication Critical patent/WO2011083925A3/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00Corrugating tubes
    • B21D15/04Corrugating tubes transversely, e.g. helically
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12Making tubes or metal hoses with helically arranged seams
    • B21C37/121Making tubes or metal hoses with helically arranged seams with non-welded and non-soldered seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12Making tubes or metal hoses with helically arranged seams
    • B21C37/124Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • the present invention is made of a corrugated steel pipe spirally formed in the tube body to the inner diameter portion is smooth without bending to improve the strength of the product itself, as well as the production of corrugated steel pipe to ensure that the flow of fluid at all times during use A method and apparatus are disclosed.
  • a concrete fume pipe is mainly used as a pipe for guiding fluid movement in a road, a harbor, and a sewage treatment plant.
  • the concrete fume pipe requires heavy equipment input during transportation and handling due to an increase in its weight and volume.
  • the construction period becomes longer due to the increase of the joints due to the deterioration of workability due to the installation and dismantling of the formwork, and there is a problem of being subject to seasonal constraints due to freezing of the foundation cement connecting the joints.
  • the concrete fume pipe is excellent in strength, but weak to the impact from the outside during transportation and construction has a problem that is easily cracked or broken when severe.
  • steel pipes are rolled in a spiral shape, and steel pipes having a lock seam connected to the rolled boundary are being used.
  • a general steel pipe is made of a tubular body 1, which is rolled in a spiral and whose boundary portion is lock cored. And this tube body (1) is made of a simple form, all of which is smooth except for the lock core connecting portion.
  • the steel pipe of such a structure solves the problems of the concrete fume pipe, but has a problem that the strength of the inner diameter part 11 except the lock core connection portion is considerably inferior, and is used for guiding the transfer of fluids such as water and sewage. It was not widely used.
  • a corrugated steel pipe is known in which a pleat (2) in which a recessed portion (2a) in the form of a recess is formed on the inner diameter portion (11) is formed.
  • the conventional corrugated steel pipe is manufactured through the following process.
  • the corrugations 2 in the state where the recessed portion 2a of the depression shape is integrated in the steel sheet are formed in the longitudinal direction, and the connecting rings are formed at both ends.
  • the steel sheet formed with the corrugation (2) and the linking ring is rolled in a spiral while the rolled boundary portion is connected to the lock core. Accordingly, the steel sheet is formed in the tubular body 1 in a cylindrical shape while the corrugation 2 is formed, thereby obtaining a corrugated steel pipe having a structure as shown in FIGS. 3 and 4.
  • Utility Model Registration No. 187831 and Patent Application No. 2001-67507 are provided with a double-wall corrugated steel pipe, and the above techniques are smooth pipes having smooth surfaces on the inner diameter of the corrugated body.
  • the above techniques are smooth pipes having smooth surfaces on the inner diameter of the corrugated body.
  • the sediment does not accumulate, but in the structure fixed by contacting the smooth tube with a smooth surface on the inner diameter of the corrugated tube body as in the above structure, the material cost is increased as well as the use of the smooth tube, and the overall weight is also increased.
  • problems such as, and workability also decreases because welding must be performed in the working process. There were other problems.
  • the pleats 12 are formed in a spiral shape by closely contacting both ends of the inlet of the concave portion 12a formed in the tube body 1 to be in contact with each other. While the corrugation 12 is formed, the inner diameter portion 11 of the tubular body 1 is developed to have a corrugated steel pipe smoothed without bending, so that the strength of the tubular body 1 itself is improved and the use of a smooth tube. Except to reduce the weight and manufacturing cost, as well as to ensure a stable flow of the fluid during use.
  • Patent Document 0001 Domestic Utility Model Registration No. 187831 (announced on July 15, 2000), Figure 2
  • Patent Document 0002 Domestic Patent Application No. 2001-67507 (published May 9, 2003), Figure 7
  • the conventional corrugated steel pipes as described above have a pipe body (1) due to various reasons, such as being pulled to the floor or collided with heavy equipment during construction, or a heavy weight such as a vehicle passes over the steel pipe after construction. There is a problem that the wrinkles 12 protruding outwardly are frequently damaged.
  • the pleats 12 have a structure that is very vulnerable to external force because they are molded to be in close contact with the inlet end of the concave portion (12a). Therefore, when an external force is applied to the pleats 12, the structure in which the external force is concentrated on both ends of the inlet of the concave portion 12a is inevitable regardless of the shape of the pleats 12.
  • the present invention has been made to solve the above problems, it is an object of the present invention to provide a method and apparatus for producing a corrugated steel pipe excellent in the strength of the wrinkles while the inner diameter of the tube body excluding the wrinkles are smooth.
  • the manufacturing method of the corrugated steel pipe of the present invention comprises the steps of inputting a flat plate to the first roll forming; Forming a first wrinkle part having a recess in the flat steel plate surface; Forming a pair of inclined portions inclined outward on both sides of the first wrinkle portion; Shaping each of the inclined portions into a pair of spaced apart second wrinkle portions that are opposite to the first wrinkles and have a recess portion; Pressing the first upper end of the first wrinkle part to form the second wrinkle part in close contact with each other; Pressing the second upper end of the first wrinkle part to form the upper end of the first wrinkle part to be in close contact with the recess of the second wrinkle part while forming the same plane as the surface of the steel sheet; And forming the cylindrical shape by passing the steel sheet through a second roll forming machine to roll in a spiral shape.
  • the step of forming the first ring portion and the second wrinkle portion during the forming of the connecting ring for forming the lock core connection to both ends of the steel sheet further go through
  • the steel sheet is formed such that the boundary portion is connected to a lock core by a connecting ring to form a tubular body in a cylindrical shape.
  • the apparatus for manufacturing a corrugated steel pipe of the present invention comprises a first roll forming machine for forming the uncoiler and the corrugations in the longitudinal direction in which the recessed portion of the recess is formed on the surface of the flat steel sheet rolled into the uncoil in a roll state;
  • the apparatus for producing corrugated steel pipes having a second roll forming machine for rolling a steel sheet exiting the first roll forming machine in a spiral shape and forming a cylindrical shape, the first roll forming machine is rotated while being engaged with each other through an uneven portion formed in the center.
  • a first upper and lower die roller for forming a first wrinkle part having a recess in the flat steel plate; Conical, lower die rollers disposed behind the first upper and lower dies to form inclined portions inclined outwardly to both sides of the first pleats; A dual upper and lower die rollers which engage with each other through a pair of uneven parts formed at a center thereof and rotate to form a pair of second wrinkle parts having a concave part in a direction opposite to the first wrinkles on the inclined part; In the center has a recess having a width larger than the second wrinkles, and the first wrinkles are first pressed downward in the state in which the first wrinkles and the second wrinkles are seated on the recesses so that the second wrinkles are mutually in the grooves.
  • a second upper and lower roller configured to be formed in close contact with each other; And positioned behind the second upper and lower die rollers to pressurize the first wrinkle part downwards to make the upper end of the first wrinkle part coplanar with the surface of the steel sheet and to be in close contact with both ends of the inlet of each recess of the second wrinkle part. And the third upper and lower die rollers are formed to shape the recess to maintain the airtightness without any gaps.
  • the third upper roller is a flat roller
  • the recess formed in the second lower roller consists of a single horizontal plane and a pair of vertical walls.
  • the lower roller has a double roller, the lower roller has a pair of first uneven portion formed in the center and the second uneven portion formed between the first uneven portion, in this case the first uneven portion and It is preferable that 2 uneven parts are formed continuously, and the length of a said 1st uneven part is smaller than a 2nd uneven part, and the width
  • the middle upper roller having the same shape as the second upper roller, and the stone located at the center of the recess of the first fold part in the center of the recess of the second roller
  • An intermediate lower roller having an additional shape may be disposed.
  • the present invention configured as described above forms a crease in the shape of a dimple which consists of a pair of right-angled triangular creases facing each other to be in close contact with each other, and the smooth support part which is tightly supported at both ends of the inlet of the recess is formed at both ends of the inlet of the recess.
  • Formed to be connected integrally when the external force is applied to the wrinkles by effectively canceling or dispersing the external force applied to the wrinkles can effectively produce a corrugated steel pipe that can significantly improve the strength of the wrinkles in a simple way There is.
  • 1 is a main view of the general steel pipe.
  • Figure 2 is a longitudinal sectional view of the main portion of a typical steel pipe.
  • FIG 3 is a yab perspective view showing an example of a conventional corrugated steel pipe.
  • Figure 4 is a longitudinal sectional view of the main portion showing an example of a conventional corrugated steel pipe.
  • Fig. 5 is a longitudinal sectional view of a main portion showing another example of a conventional corrugated steel pipe.
  • 6A and 6B are enlarged longitudinal cross-sectional views, respectively, showing a state in which an external force is applied to the corrugated steel pipe of FIG.
  • FIG. 7 is a perspective view showing a corrugated steel pipe according to the present invention.
  • FIG. 8 is a main longitudinal cross-sectional view showing a corrugated steel pipe according to the present invention.
  • FIG. 9 is a front view showing a manufacturing apparatus of corrugated steel pipe according to the present invention.
  • FIG. 10 is a view sequentially arranged rollers of the first roll forming machine constituting the apparatus for manufacturing corrugated steel pipe according to the present invention in the molding order.
  • FIG. 11 is a flow chart showing a method of manufacturing a corrugated steel pipe according to the present invention.
  • the corrugated steel pipe made in accordance with the present invention is a whole of the bellows-shaped corrugated body having a concave concave portion 30 in the inner diameter portion 11 of the tube body (1)
  • Has The pleats have a pair of right triangle pleats 21 and 21 facing each other in close contact with each other.
  • the wrinkles 21 and 21 form a flat support 22 that is in close contact with the inner ends 11 and 31 of the concave inlet 30 while forming the same plane as the inner diameter 11 of the tube body 1. It is connected integrally through.
  • the smooth support 22 has a gap between the recessed part 30 and the gap by completely closing the entrance of the recessed part 30 in a state in which both ends thereof are integrally connected to the hypotenuse 21a of the wrinkled part 21 forming a right triangle. Will remain confidential.
  • the corrugated steel pipe of such a structure has a crevice 20 of the crease 20 formed to improve the strength of the tubular body 1 when the fluid is guided to the corrugated steel pipe of the present invention in the process of being used after construction. Since the airtight state is maintained without the inner diameter portion 11 of the tube body 1 is a smooth smooth state except the lock core connection portion. Therefore, the fluid flowing inside the tube body 1 not only has good flow, but also no sediment.
  • the positive pressure (F) when the positive pressure (F) is applied to the pleats 20, the positive pressure (F) is the both ends of the inlet of the concave inlet portion 30 through the hypotenuses (21a, 21a) forming the pleats 21, 21 It is delivered to (31, 31), the hypotenuses (21a, 21a) is a state that one end is supported while facing each other and the other end is supported on both ends (31, 31) of the inlet end of the indentation 30 The positive pressure F applied through the mutual supporting force of the parts 21 and 21 cancels out, thereby minimizing damage and deformation of the wrinkles 20.
  • the side pressure (F1) acts as a right angle surface of the pleats 21 on one side, each of the pleats 21, 21 are supported facing each other Since the hypotenuse 21a of the corrugation portion 21 to which the side pressure F1 is applied is supported by the inlet end 31 of the concave portion 30, the side pressure F1 corresponds to the corrugation portion 21. It is dispersed along the hypotenuse 21a of () and is absorbed to the opposite wrinkle part 21 side. Thus, damage and deformation of the pleats 20 are minimized.
  • the corrugated steel pipe configured as described above is manufactured through the following process.
  • the first roll forming machine 100a on one side is released while the rolled steel sheet is released.
  • the steel sheet is gradually formed to have a wrinkle as described above while passing through the various forming rollers (110 ⁇ 190) constituting the first roll forming machine (100a) step by step.
  • the connecting ring 138 for forming the lock core connection to both ends of the steel sheet is also formed together.
  • the steel sheet formed by passing through the first roll forming machine (100a) to form a corrugation is passed through the second roll forming machine (100b) and rolled in a spiral shape to form a cylindrical shape while connecting the connecting ring 138 to the core of the steel sheet.
  • a corrugated steel pipe having a plurality of corrugations having a spiral concave portion in the inner diameter portion of the tube body is completed.
  • the apparatus for manufacturing a corrugated steel pipe of the present invention for carrying out such a manufacturing method is basically the uncoiler and the wrinkles in the state in which the recessed portion of the recess shape is integrated on the surface of the flat steel plate rolled into the uncoil in the longitudinal direction.
  • the rest of the uncoiler and the second roll forming machine 100b except for the machine 100a are the same as in the related art, and thus a detailed description thereof will be omitted.
  • the first roll forming machine (100a) is a first, upper, lower roller (formerly referred to as 'uneven portion') formed in the central portion 113a and protrusion 113b (hereinafter referred to as 'uneven portion') ( 110).
  • the first, upper and lower rollers 110 are installed to be engaged with each other through the concave-convex portion 113 in a spaced apart state corresponding to the thickness of the flat steel plate.
  • the flat plate inserted into the first roll forming machine 100a has a first wrinkle portion A having a recessed portion integrally formed on the surface thereof while passing between the first, upper and lower rollers 110.
  • the first, the upper and lower die roller 110 is the step of increasing the length of the uneven portion 113 in the direction of the flat plate for smooth molding of the first wrinkles (A) step by step of the uneven portion 113 It is desirable to be provided in multiple stages so that the width is reduced in stages. In this case, as the flat plate passes through the first, upper and lower rollers 110 and 120 installed in multiple stages, the first wrinkle portion A increases to an appropriate height and is reduced to an appropriate width.
  • conical and lower rollers 130 are disposed at the rear of the first, upper and lower rollers 110.
  • the conical roller 131 has a body having the same concave portion 133a as the first upper roller 111 in the center and the conical surface 134 narrowing to both sides.
  • the lower conical roller 132 is composed of a body having a conical surface 135 widening to both sides having the same protrusion 133b as the first lower roller 112 in the center.
  • the conical, lower die roller 130 is of course spaced apart as much as the thickness of the steel sheet.
  • the conical and lower die rollers 130 form inclined portions 136 inclined outwardly to both sides of the first wrinkle portion A of the steel sheet exiting the first, upper and lower die rollers 110.
  • the double upper and lower rollers 140 are disposed at the rear of the conical and lower rollers 130.
  • the double upper and lower rollers 140 have a pair of first uneven parts 143 and a second uneven part 144 positioned between the first uneven parts 143 and 143.
  • the first concave-convex portion 143 includes a double protrusion 143a formed on the double upper roller 141 and a double recess 143b formed on the double lower roller 142 so as to correspond to the protrusions 143a.
  • the second uneven portion 144 has a recess 144a formed in the same manner as the recess 133a of the conical roller 132 between the protrusion 143a and the protrusion 143a of the dual roller 141. It consists of a protrusion 144b formed in the same manner as the protrusion 133b of the conical roller 132 between the recessed part 143b and the recessed part 143b of the double lowered roller 142.
  • the first uneven portion 143 and the second uneven portion 144 should be formed continuously, the length (h) of the first uneven portion 143 is the length (H) of the second uneven portion 144 It is smaller and the width w of the first uneven portion 143 should be narrower than the width W of the second uneven portion 144.
  • the double upper and lower rollers 140 are spaced apart as much as the thickness of the steel sheet.
  • the double upper and lower die rollers 140 have a first pleated portion (1) on the inclined portion 136 of the steel sheet exiting the conical and lower die rollers 130 while rotating in a state where the first and second uneven parts 143 and 144 are engaged with each other.
  • a pair of second wrinkles B having integrally recessed portions in the opposite direction to A) is molded.
  • the dual upper and lower rollers 140 may be installed in multiple stages as the first, upper and lower rollers 110 so that the second wrinkles B may be smoothly formed.
  • the second upper and lower die rollers 160 are disposed at the rear of the double upper and lower die rollers 140.
  • the second upper and lower die rollers 160 have recesses 163 and 164 formed at their centers, respectively.
  • First and second wrinkles A and B are seated on the recesses 163 and 164, respectively.
  • the recesses 163 and 164 are formed to allow the first wrinkles A and the second wrinkles B to be seated in a relaxed manner, and the recesses 164 formed on the second lower roller 162 have a single horizontal surface. 164a and a pair of vertical surfaces 164b.
  • the second upper and lower die rollers 160 are spaced apart as much as the thickness of the steel sheet.
  • the second upper and lower die rollers 160 configured as described above presses the upper end of the first wrinkle part A of the steel sheet exiting the dual upper and lower die rollers 140 downwardly, thereby causing the first wrinkle part ( A) is the inlet of the indents are in close contact with each other at the same time the top is formed flat, the second wrinkles (B) are in close contact with each other while being in close contact with the vertical surface (164b) of the recessed portion 164 of the second lower roller (162). It is molded into a pair of right triangles.
  • the second upper and lower die rollers 160 are multi-stage like the double upper and lower die rollers 140 or the first and upper and lower die rollers 110 for smooth molding of the first and second wrinkles (A and B). It is preferable to install.
  • the second upper and lower die rollers 160, 170, and 180 are installed in multiple stages so that the depth of the recess is gradually decreased, and the upper and lower ends of the first wrinkle portion A are gradually lowered in accordance with the traveling direction of the flat plate to be flattened. do.
  • a separate intermediate upper and lower die rollers 150 are further provided for smooth molding of the first and second wrinkle parts A and B. It is desirable to.
  • the intermediate upper roller 151 is formed in the same shape as the second upper roller 161, the intermediate lower roller 152 of the double lower roller 142 in the center of the main portion 163 of the second upper roller 161.
  • a narrower and smaller sized protrusion 155 is formed than the protrusion 144b.
  • the intermediate upper and lower die rollers 150 are spaced apart as much as the thickness of the steel sheet.
  • the intermediate upper and lower rollers 150 configured as described above are pressurized on the upper end of the first wrinkle part A before the steel sheet exiting the dual upper and lower rollers 140 enters the second upper and lower rollers 160.
  • the concave portion of the corrugated portion A is formed to be in close contact with both side walls of the protrusion 155 of the intermediate lower roller 152, and the intermediate lower roller 152 has the second wrinkles B of the intermediate lower roller 152.
  • Preliminary molding is performed to facilitate the molding operation of the second upper and lower mold rollers 160, which are formed to be in close contact with the vertical wall surface of the recess 154.
  • the third upper and lower rollers 190 are disposed behind the second upper and lower rollers 160.
  • the third upper roller 191 is a flat roller
  • the third lower roller 192 is the same roller as the second lower roller 162.
  • the third upper and lower die rollers 190 have a first wrinkle portion A such that the first wrinkle portion A of the steel sheet exiting the second upper and lower die rollers 160 is coplanar with the surface of the steel sheet.
  • the third upper and lower die rollers 190 are spaced apart as much as the thickness of the steel sheet.
  • Using the apparatus for producing a corrugated steel pipe of the present invention configured as described above can form a corrugated steel pipe through the following method.
  • the steel sheet having the inclined portion 136 is formed to pass through the double upper and lower rollers 140, and in this process, the inclined portions 136 are pressed by the dual upper and lower rollers 140, and are opposite to the first wrinkles A. Is formed into a pair of second wrinkles B having both the direction and the recess in one body. (S4)
  • the intermediate lower roller (152) second wrinkles (B) May be molded to be in close contact with the vertical wall surface of the recessed portion of the intermediate roller. Therefore, the subsequent forming operation of the second upper and lower die rollers 160 is facilitated.
  • the steel sheet formed with the second wrinkle part B passes through the second upper and lower mold rollers 160, and in this process, the upper end of the first wrinkle part A is formed by the second upper mold roller 161.
  • the first wrinkle is formed flat and at the same time, the second wrinkle portion (B) is formed on the inner wall surface of the groove portion 164 of the second lower die roller 162 formed of a horizontal surface 164a and a pair of vertical surfaces 164b. While being in close contact, they are molded into a pair of right triangles facing each other.
  • the Both ends of the steel sheet may be molded together with a connecting ring 138 for the lock core connection is made.
  • the first wrinkle portion (A) and the second wrinkle portion (B) is formed in the longitudinal direction and pass through the second roll forming machine (100b) the steel sheet with the connecting ring 138 is formed at both ends. Then, due to the structural action of the second roll forming machine (100b) the steel sheet is rolled spirally in the second roll forming machine (100b) and the boundary portion is the lock core connection by the connecting ring 138, accordingly the steel sheet is In the state where the first and second wrinkles (A, B) is formed, the tubular body is formed in a cylindrical shape and eventually becomes a corrugated steel pipe having a structure as shown in FIGS. 7 and 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The present invention relates to a method and apparatus for manufacturing a corrugated steel pipe, in which a spiral corrugation is formed on the body of the pipe, and the inner surface of the body of the pipe is smooth without any curvature to thereby improve the strength of the pipe and enable a fluid to stably flow during use. The method for manufacturing a corrugated pipe according to the present invention comprises the following steps: feeding a steel sheet into a first roll forming machine (100a); forming a first corrugated portion (A), including a recess formed integrally therein, on the surface of the steel sheet; forming a pair of tilted portions (136) outwardly from either side of the first corrugated portion (A); forming said pair of tilted portions (136) into a pair of second corrugated portions (B) having a recesses formed integrally therein, and which are corrugated in the direction opposite to the first corrugated portion; firstly pressing the top of the first corrugated portion (A) such that the second corrugated portions (B) are tightly disposed opposite one another; secondly pressing the top of the first corrugated portion (A) such that the top of the first corrugated portion (A) forms the same plane as the surface of the steel sheet and tightly contacts the recesses of the second corrugated portions (B); and passing the steel sheet through a second roll forming machine (100b) and winding the steel sheet into a cylindrical shape.

Description

주름형 강관의 제작방법 및 장치Manufacturing method and apparatus of corrugated steel pipe
본 발명은 관 몸체에 나선상으로 주름이 형성되면서도 그 내경부는 굴곡됨 없이 매끄럽도록 구성하여 제품 자체의 강도가 향상되도록 함은 물론 사용과정에서는 유체의 흐름이 항상 안정되도록 한 주름형 강관의 제작방법 및 장치에 관한 것이다.The present invention is made of a corrugated steel pipe spirally formed in the tube body to the inner diameter portion is smooth without bending to improve the strength of the product itself, as well as the production of corrugated steel pipe to ensure that the flow of fluid at all times during use A method and apparatus are disclosed.
일반적으로 도로, 항만, 하수처리장 등에서 유체의 이동을 안내하는 관으로는 콘크리트 흄관이 주로 사용되고 있는데, 상기 콘크리트 흄관은 자체의 중량 및 부피의 증가로 인하여 운반 및 취급시에 중장비의 투입이 요구되고, 시공시 거푸집의 설치 및 해체에 따른 작업성 저하와 함께 연결부의 증가로 인해 공사기간이 길어지며, 연결부를 잇는 기초 시멘트의 동결로 인한 계절적 제약을 받게 되는 문제점을 갖게 된다.In general, a concrete fume pipe is mainly used as a pipe for guiding fluid movement in a road, a harbor, and a sewage treatment plant. The concrete fume pipe requires heavy equipment input during transportation and handling due to an increase in its weight and volume. During construction, the construction period becomes longer due to the increase of the joints due to the deterioration of workability due to the installation and dismantling of the formwork, and there is a problem of being subject to seasonal constraints due to freezing of the foundation cement connecting the joints.
또한 콘크리트 흄관은 강도는 우수하지만 운반 및 시공시 외부로부터 가해지는 충격에 약해 쉽게 균열되거나 심할 경우 파손되는 문제점을 갖는다.In addition, the concrete fume pipe is excellent in strength, but weak to the impact from the outside during transportation and construction has a problem that is easily cracked or broken when severe.
따라서 근래에는 강판을 나선상으로 말아 그 말아진 경계부분을 락심(lock seam) 연결한 강관이 사용되고 있는 실정이고 그 사용량이 점점 더 증대되고 있다.Therefore, in recent years, steel pipes are rolled in a spiral shape, and steel pipes having a lock seam connected to the rolled boundary are being used.
도 1 및 도 2에 도시된 바와 같이, 일반적인 강관은 나선상으로 말아져 그 경계부분이 락심연결된 관 몸체(1)로 이루어진다. 그리고 이 관 몸체(1)는 상기 락심연결부분을 제외한 나머지 부분이 모두 매끄러운 단순한 형태로 이루어진다. 이러한 구조의 강관은 콘크리트 흄관의 문제점을 상당부분 해결하고 있지만 락심연결 부위를 제외한 나머지 내경부(11)의 강도가 상당이 떨어지는 문제점을 안고 있어 상,하수도와 같은 유체의 이송을 안내하는 용도로는 폭넓게 사용되지 못하였다.As shown in Figs. 1 and 2, a general steel pipe is made of a tubular body 1, which is rolled in a spiral and whose boundary portion is lock cored. And this tube body (1) is made of a simple form, all of which is smooth except for the lock core connecting portion. The steel pipe of such a structure solves the problems of the concrete fume pipe, but has a problem that the strength of the inner diameter part 11 except the lock core connection portion is considerably inferior, and is used for guiding the transfer of fluids such as water and sewage. It was not widely used.
상기한 일반적인 강관의 문제점을 해결하기 위하여, 도 3 및 도 4에 도시된 바와 같이 강판을 나선으로 말아 그 말아진 경계부분을 락심으로 연결한 관 몸체(1)의 둘레에 길이방향을 따라 나선을 이루도록 내경부(11)에 디귿자 형태의 요입부(2a)가 일체화된 주름(2)을 형성한 주름형 강관이 알려져 있다.In order to solve the above problems of the general steel pipe, as shown in FIGS. 3 and 4, spirally wound the steel plate along the longitudinal direction around the tube body 1 connecting the rolled boundary to the lock core. A corrugated steel pipe is known in which a pleat (2) in which a recessed portion (2a) in the form of a recess is formed on the inner diameter portion (11) is formed.
상기 종래 주름형 강관은 다음과 같은 과정을 거쳐 제작된다.The conventional corrugated steel pipe is manufactured through the following process.
먼저 롤상태로 말아진 평판형태의 강판을 구비한 다음 이를 언코일러에 장착한 후 상기 언코일러를 작동시켜 말아진 강판을 풀고, 풀어진 강판을 제1롤포밍기에 통과시키면, 상기 제1롤포밍기는 그 구조에 따라 강판에 디귿자형태의 요입부(2a)가 일체화된 상태의 주름(2)을 길이방향으로 형성시킴과 동시에 양측단부에는 연결고리를 형성시키게 된다.First, provided with a plate-shaped steel sheet rolled in a roll state, and then mounted on the uncoiler to operate the uncoiler to release the rolled steel sheet, and pass the released steel sheet to the first roll forming machine, the first roll forming machine According to the structure, the corrugations 2 in the state where the recessed portion 2a of the depression shape is integrated in the steel sheet are formed in the longitudinal direction, and the connecting rings are formed at both ends.
상기 주름(2)이 길이방향으로 형성됨과 함께 연결고리가 형성된 강판을 제2롤포밍기에 통과시키면 주름(2)과 연결고리가 형성된 강판은 나선상으로 말아지면서 그 말아지는 경계부분은 락심연결되고, 이에 따라 강판은 주름(2)이 형성되면서 원통형상으로 관 몸체(1)를 이루어 결국 도 3 및 도 4와 같은 구조의 주름형 강관이 얻어진다.When the corrugation (2) is formed in the longitudinal direction and the steel plate formed with the linking ring is passed through the second roll forming machine, the steel sheet formed with the corrugation (2) and the linking ring is rolled in a spiral while the rolled boundary portion is connected to the lock core. Accordingly, the steel sheet is formed in the tubular body 1 in a cylindrical shape while the corrugation 2 is formed, thereby obtaining a corrugated steel pipe having a structure as shown in FIGS. 3 and 4.
그러나, 이와 같은 주름형 강관은 요입부(2a)를 통과하는 유체의 흐름성이 크게 나빠지는 문제가 있고, 이 경우 관 몸체(1)의 내경부(11)에 작용하는 압력이 과도하게 상승하면서 락심 연결부위가 자주 파열되면서 누수가 발생되는 문제점이 있다. 뿐만 아니라, 요입부(2a)에 침전물이 쌓이게 되면서 오랜기간 사용할 경우 침전물의 부패로 인해 유체가 오염되는 문제점을 갖게 된다.However, such a corrugated steel pipe has a problem that the flowability of the fluid passing through the concave portion 2a is greatly deteriorated, and in this case, the pressure acting on the inner diameter 11 of the pipe body 1 is excessively increased. There is a problem that the leakage occurs because the lock core connection part is often broken. In addition, the sediment is accumulated in the concave portion (2a) has a problem that the fluid is contaminated due to the decay of the sediment when used for a long time.
한편, 상기한 문제점을 해결하고자 실용신안등록 제187831호 및 특허출원 제2001-67507호로 이중벽체형 파형강관이 제공되고 있는바, 상기한 기술들은 파형이 형성된 관 몸체의 내경부에 표면이 매끄러운 평활관을 접촉시킨 다음 상기 관 몸체와 평활관을 용접 고정하여 상기 평활관이 관 몸체에 파형을 형성함에 따라 일체화된 요입부가 커버되도록 구성하여 시공 후 사용과정에서 유체가 안내될 때 흐름에 방해가 일어나지 않도록 함과 함께 침전물이 쌓이지 않도록 하고는 있으나, 상기 구조에서와 같이 파형을 이루는 관 몸체의 내경부에 표면이 매끄러운 평활관을 접촉시켜 고정한 구조에서는 평활관의 사용량 만큼 재료비가 증가됨은 물론 전체적인 무게도 증가되는 등의 다른 문제점이 있고, 또한 작업 과정에서 용접을 해야 하므로 작업성도 저하되는 다른 문제점도 있었다.Meanwhile, in order to solve the above problems, Utility Model Registration No. 187831 and Patent Application No. 2001-67507 are provided with a double-wall corrugated steel pipe, and the above techniques are smooth pipes having smooth surfaces on the inner diameter of the corrugated body. Contact the pipe body and weld the pipe and the smooth pipe to form a corrugated pipe to form an integrated concave indentation to form a corrugated body so that the flow does not interfere with the flow when the fluid is guided during use after construction In addition, the sediment does not accumulate, but in the structure fixed by contacting the smooth tube with a smooth surface on the inner diameter of the corrugated tube body as in the above structure, the material cost is increased as well as the use of the smooth tube, and the overall weight is also increased. There are other problems such as, and workability also decreases because welding must be performed in the working process. There were other problems.
따라서, 최근에는 도 5에 도시된 바와 같이, 상기 관 몸체(1)에 형성되는 요입부(12a)의 입구 양단을 접촉되게 밀착시켜 주름(12)을 형성시킴으로써, 관 몸체(1)에는 나선상으로 주름(12)이 형성되도록 하면서도 관 몸체(1)의 내경부(11)는 굴곡됨이 없이 매끄럽도록 한 주름형 강관이 개발되어 관 몸체(1)의 자체 강도가 향상 되도록하고 평활관의 사용을 배제하여 무게와 제작비를 모두 경감시키는 것은 물론 사용과정에서는 유체가 안정적으로 흐를 수 있도록 하고 있다.Therefore, as shown in FIG. 5, the pleats 12 are formed in a spiral shape by closely contacting both ends of the inlet of the concave portion 12a formed in the tube body 1 to be in contact with each other. While the corrugation 12 is formed, the inner diameter portion 11 of the tubular body 1 is developed to have a corrugated steel pipe smoothed without bending, so that the strength of the tubular body 1 itself is improved and the use of a smooth tube. Except to reduce the weight and manufacturing cost, as well as to ensure a stable flow of the fluid during use.
선행기술문헌Prior art literature
특허문헌Patent Literature
(특허문헌 0001) 국내실용신안등록제187831호(2000.07.15.공고),도2(Patent Document 0001) Domestic Utility Model Registration No. 187831 (announced on July 15, 2000), Figure 2
(특허문헌 0002) 국내특허출원제2001-67507호(2003.05.09.공개),도7(Patent Document 0002) Domestic Patent Application No. 2001-67507 (published May 9, 2003), Figure 7
그러나, 상기와 같은 종래의 주름형 강관들은 시공과정에서 바닥에 끌리거나 중장비와 충돌된다거나 시공된 이 후 강관의 위로 차량과 같은 중량물이 통과한다거나 하는 등의 여러 가지 이유들로 인해 관 몸체(1)의 외측으로 돌출된 주름(12)이 빈번하게 손상되는 문제가 있다.However, the conventional corrugated steel pipes as described above have a pipe body (1) due to various reasons, such as being pulled to the floor or collided with heavy equipment during construction, or a heavy weight such as a vehicle passes over the steel pipe after construction. There is a problem that the wrinkles 12 protruding outwardly are frequently damaged.
이는, 상기 주름(12)은 요입부(12a)의 입구 양단이 밀착되도록 성형되었기 때문에 외력에 매우 취약한 구조를 갖기 때문이다. 따라서, 상기 주름(12)에 외력이 인가될 경우, 주름(12)의 형상과는 관계없이 요입부(12a)의 입구 양단으로 외력이 집중되는 구조를 피할 수 없는 것이다.This is because the pleats 12 have a structure that is very vulnerable to external force because they are molded to be in close contact with the inlet end of the concave portion (12a). Therefore, when an external force is applied to the pleats 12, the structure in which the external force is concentrated on both ends of the inlet of the concave portion 12a is inevitable regardless of the shape of the pleats 12.
예컨대, 도 6a에 도시된 바와 같이, 주름(12)이 정압(F)을 받을 경우에는 밀착된 주름(12)이 눌리면서 요입부(12a)의 입구가 벌어지게 되므로 관의 내부를 흐르는 유체의 흐름성이 나빠지게 되며, 도 6b에 도시된 바와 같이, 주름(12)이 횡압(F1)을 받을 경우에는 주름(12)이 쉽게 꺽이면서 망실되어 관의 강도가 취약하게 될 뿐만 아니라 심할 경우 주름(12) 부위에 크랙이 발생되어 이 부위로 누수가 되는 심각한 문제로 이어지게 된다.For example, as shown in Figure 6a, when the pleat 12 receives a positive pressure (F), the inlet of the concave portion (12a) is opened while the close pleat 12 is pressed, so that the flow of fluid flowing inside the tube 6B, when the wrinkle 12 receives the transverse pressure F1, the wrinkle 12 easily breaks and is lost, and the strength of the tube is not only weak, but also the wrinkle is severe. 12) Cracks in the area lead to a serious problem of leakage into the area.
본 발명은 상기한 문제점들을 해결하기 위해 안출된 것으로서, 주름을 제외한 관 몸체의 내경부가 평활하면서 주름의 강도도 우수한 주름형 강관의 제작방법 및 장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, it is an object of the present invention to provide a method and apparatus for producing a corrugated steel pipe excellent in the strength of the wrinkles while the inner diameter of the tube body excluding the wrinkles are smooth.
상기 목적을 달성하기 위해, 본 발명의 주름형 강관의 제작방법은 제1롤포밍기에 평강판을 투입하는 단계; 평강판 표면에 요입부를 일체로 갖는 제1주름부를 성형하는 단계; 상기 제1주름부의 양측에 외측으로 경사진 한 쌍의 경사부를 성형하는 단계; 상기 각 경사부를 제1주름과 반대방향이면서 요입부를 일체로 갖는 이격된 한 쌍의 제2주름부로 성형하는 단계; 상기 제1주름부의 상단을 1차 가압하여 상기 제2주름부를 서로 밀착되게 마주하도록 성형하는 단계; 제1주름부의 상단을 2차 가압하여 상기 제1주름부의 상단이 강판의 표면과 동일평면을 이루면서 제2주름부의 요입부에 밀착되도록 성형하는 단계; 및 상기 강판을 제2롤포밍기에 통과시켜 나선상으로 말아 원통형상으로 성형하는 단계를 포함하여 이루어진 것을 특징으로 한다.In order to achieve the above object, the manufacturing method of the corrugated steel pipe of the present invention comprises the steps of inputting a flat plate to the first roll forming; Forming a first wrinkle part having a recess in the flat steel plate surface; Forming a pair of inclined portions inclined outward on both sides of the first wrinkle portion; Shaping each of the inclined portions into a pair of spaced apart second wrinkle portions that are opposite to the first wrinkles and have a recess portion; Pressing the first upper end of the first wrinkle part to form the second wrinkle part in close contact with each other; Pressing the second upper end of the first wrinkle part to form the upper end of the first wrinkle part to be in close contact with the recess of the second wrinkle part while forming the same plane as the surface of the steel sheet; And forming the cylindrical shape by passing the steel sheet through a second roll forming machine to roll in a spiral shape.
또한, 상기 제1롤포밍기에 평강판을 투입하는 단계 이후에 제1주름부와 제2주름부의 성형시 강판의 양측단부에 락심연결이 이루어지도록 하기 위한 연결고리도 함께 성형되도록 하는 단계를 더 거치도록 하고, 상기 강판을 제2롤포밍기에 통과시켜 나선상으로 말아 원통형상으로 성형하는 단계에서 상기 강판은 경계부분이 연결고리에 의해 락심 연결되어 원통형상으로 관 몸체를 이루도록 성형되도록 한다.In addition, after the step of inserting the flat plate into the first roll forming machine, the step of forming the first ring portion and the second wrinkle portion during the forming of the connecting ring for forming the lock core connection to both ends of the steel sheet further go through In the step of rolling the steel sheet through a second roll forming machine to form a spiral by rolling in a spiral shape, the steel sheet is formed such that the boundary portion is connected to a lock core by a connecting ring to form a tubular body in a cylindrical shape.
그리고 본 발명의 주름형 강관의 제작장치는 언코일러와, 언코일에 롤상태로 말아진 평강판의 표면에 디귿자형태의 요입부가 일체화된 상태의 주름을 길이방향으로 형성시키는제1롤포밍기와, 제1롤포밍기를 빠져나온 강판을 나선상으로 말아 원통형상으로 성형하는 제2롤포밍기를 구비한 주름형 강관의 제작장치에 있어서, 상기 제1롤포밍기가, 중앙에 형성된 요철부를 통해 서로 맞물려 회전하면서 평강판 표면에 요입부를 일체로 갖는 제1주름부를 성형하는 제1상,하형롤러; 제1상,하형 후방에 배치되어 상기 제1주름부의 양측으로 외측으로 경사진 경사부를 성형하는 원추상,하형롤러; 중앙에 이격되게 형성된 한 쌍의 요철부를 통해 서로 맞물려 회전하면서 상기 경사부에 제1주름과 반대방향으로 요입부를 일체로 갖는 한 쌍의 제2주름부를 성형하는 이중상,하형롤러; 중앙에 제2주름보다 큰 폭을 갖는 요부를 가지며, 상기 요부에 제1주름부와 제2주름부를 안착시킨 상태에서 제1주름부를 하방으로 1차 가압하여 상기 제2주름부들이 홈부내에서 서로 밀착되게 마주하도록 성형시키는 제2상,하형롤러; 및 제2상,하형롤러의 후방에 위치되어 상기 제1주름부를 하방으로 2차 가압하여 제1주름부의 상단을 강판의 표면과 동일평면을 이루면서 각 제2주름부의 요입부의 입구 양단에 밀착되게 지지되어 상기 요입부가 틈새없이 기밀을 유지할 수 있도록 성형시키는 제3상,하형롤러를 포함하여 이루어진 것을 특징으로 한다.In addition, the apparatus for manufacturing a corrugated steel pipe of the present invention comprises a first roll forming machine for forming the uncoiler and the corrugations in the longitudinal direction in which the recessed portion of the recess is formed on the surface of the flat steel sheet rolled into the uncoil in a roll state; In the apparatus for producing corrugated steel pipes having a second roll forming machine for rolling a steel sheet exiting the first roll forming machine in a spiral shape and forming a cylindrical shape, the first roll forming machine is rotated while being engaged with each other through an uneven portion formed in the center. A first upper and lower die roller for forming a first wrinkle part having a recess in the flat steel plate; Conical, lower die rollers disposed behind the first upper and lower dies to form inclined portions inclined outwardly to both sides of the first pleats; A dual upper and lower die rollers which engage with each other through a pair of uneven parts formed at a center thereof and rotate to form a pair of second wrinkle parts having a concave part in a direction opposite to the first wrinkles on the inclined part; In the center has a recess having a width larger than the second wrinkles, and the first wrinkles are first pressed downward in the state in which the first wrinkles and the second wrinkles are seated on the recesses so that the second wrinkles are mutually in the grooves. A second upper and lower roller configured to be formed in close contact with each other; And positioned behind the second upper and lower die rollers to pressurize the first wrinkle part downwards to make the upper end of the first wrinkle part coplanar with the surface of the steel sheet and to be in close contact with both ends of the inlet of each recess of the second wrinkle part. And the third upper and lower die rollers are formed to shape the recess to maintain the airtightness without any gaps.
이 경우, 상기 제3상형롤러는 평롤러이며, 상기 제2하형롤러에 형성된 요부는 단일의 수평면과 한 쌍의 수직벽으로 이루어진다.In this case, the third upper roller is a flat roller, and the recess formed in the second lower roller consists of a single horizontal plane and a pair of vertical walls.
또한, 상기 이중상,하형롤러는 이중상,하형롤러는 중앙에 이격되게 형성된 한 쌍의 제1요철부와, 제1요철부 사이에 형성된 제2요철부를 구비하고, 이 경우 상기 제1요철부와 제2요철부는 연속적으로 형성되며, 상기 제1요철부의 길이는 제2요철부 보다 작고, 제1요철부의 폭은 제2요철부 보다 좁은 것이 바람직하다.In addition, the dual phase, the lower roller has a double roller, the lower roller has a pair of first uneven portion formed in the center and the second uneven portion formed between the first uneven portion, in this case the first uneven portion and It is preferable that 2 uneven parts are formed continuously, and the length of a said 1st uneven part is smaller than a 2nd uneven part, and the width | variety of a 1st uneven part is narrower than a 2nd uneven part.
또한, 상기 이중상,하형롤러와 제2상,하형롤러 사이에는 제2상형롤러와 동일한 형태로 이루어진 중간상형롤러와, 제2형상형롤러의 요부 중앙에 제1주름부의 요입부 중앙에 위치되는 돌부가 형성된 형태로 이루어진 중간하형롤러가 배치될 수도 있다.In addition, between the upper and lower rollers, and the upper and lower rollers, the middle upper roller having the same shape as the second upper roller, and the stone located at the center of the recess of the first fold part in the center of the recess of the second roller An intermediate lower roller having an additional shape may be disposed.
상기와 같이 구성된 본 발명은 서로 밀착되게 마주하는 한 쌍의 직각삼각형상의 주름부로 이루어진 디귿자 형상으로 주름을 형성시킴과 아울러 요입부의 입구 양단에 요입부의 입구 양단에 밀착 지지되는 평활지지부를 상기 주름부와 일체로 연결되게 형성시켜, 상기 주름에 외력이 인가될 경우에 주름에 인가된 외력이 효과적으로 상쇄 내지 분산되도록 함으로써 주름의 강도를 구조적으로 크게 향상시킬 수 있는 주름형 강관을 간편한 방법으로 제작할 수 있는 효과가 있다.The present invention configured as described above forms a crease in the shape of a dimple which consists of a pair of right-angled triangular creases facing each other to be in close contact with each other, and the smooth support part which is tightly supported at both ends of the inlet of the recess is formed at both ends of the inlet of the recess. Formed to be connected integrally, when the external force is applied to the wrinkles by effectively canceling or dispersing the external force applied to the wrinkles can effectively produce a corrugated steel pipe that can significantly improve the strength of the wrinkles in a simple way There is.
도 1은 일반적인 강관의 요부사시도.1 is a main view of the general steel pipe.
도 2는 일반적인 강관의 요부 종단면도.Figure 2 is a longitudinal sectional view of the main portion of a typical steel pipe.
도 3은 종래 주름형 강관의 일예를 나타내는 요부사시도.3 is a yab perspective view showing an example of a conventional corrugated steel pipe.
도 4는 종래 주름형 강관의 일예를 나타내는 요부 종단면도.Figure 4 is a longitudinal sectional view of the main portion showing an example of a conventional corrugated steel pipe.
도 5는 종래 주름형 강관의 다른예를 나타내는 요부 종단면도.Fig. 5 is a longitudinal sectional view of a main portion showing another example of a conventional corrugated steel pipe.
도 6a 및 6b는 각각 도 5의 주름형 강관에 외력이 가해져 주름이 변형된 상태를 나타내는 주름부 확대 종단면도.6A and 6B are enlarged longitudinal cross-sectional views, respectively, showing a state in which an external force is applied to the corrugated steel pipe of FIG.
도 7은 본 발명에 따른 주름형 강관을 나타내는 요부사시도.7 is a perspective view showing a corrugated steel pipe according to the present invention.
도 8은 본 발명에 따른 주름형 강관을 나타내는 요부종단면도.8 is a main longitudinal cross-sectional view showing a corrugated steel pipe according to the present invention.
도 9는 본 발명에 따른 주름형 강관의 제작장치를 나타내는 정면도.9 is a front view showing a manufacturing apparatus of corrugated steel pipe according to the present invention.
도 10은 본 발명에 따른 주름형 강관의 제작장치를 구성하는 제1롤포밍기의 롤러들을 성형순서에 따라 순차적으로 배열한 도면.10 is a view sequentially arranged rollers of the first roll forming machine constituting the apparatus for manufacturing corrugated steel pipe according to the present invention in the molding order.
도 11은 본 발명에 따른 주름형 강관의 제작방법을 나타내는 순서도.11 is a flow chart showing a method of manufacturing a corrugated steel pipe according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
100a...제1롤포밍기 100b...제2롤포밍기100a ... first roll forming machine 100b ... second roll forming machine
110...제1,상,하형롤러 113,...요철부110 1st, upper and lower rollers 113, uneven
136...경사부 138...연결고리136 ... Tilt section 138 ... Connection
130...원추상,하형롤러 140...이중상,하형롤러130 ... conical, lower roller 140 ... double, lower roller
143...제1요철부 144...제2요철부143 ... 1st uneven part 144 ... 2nd uneven part
150...중간상,하형롤러 160...제2상,하형롤러150 ... middle and lower rollers 160 ... 2nd and lower rollers
190...제3상,하형롤러 A...제1주름부190 3rd, lower roller A ... 1st wrinkle
B...제2주름부B ... second wrinkles
본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 바람직한 실시예에 대한 상세한 설명으로 더욱 명백해질 것이다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 발명자가 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.
이하, 본 발명의 일 실시예를 도면을 참조하여 상세히 설명함에 있어, 동일한 구성에 대해서는 동일한 부호를 사용하며, 명료성을 위하여 가능한 중복되지 않게 상이한 부분만을 주로 설명한다.DETAILED DESCRIPTION Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Like reference numerals refer to like elements, and only different parts will be mainly described so as not to overlap for clarity.
도 7 및 도 8에 도시된 바와 같이, 본 발명에 따라 제작된 주름형 강관은 관 몸체(1)의 내경부(11)에 나선형태의 요입부(30)를 일체로 갖는 전체적으로 디귿자 형상의 주름을 가진다. 그리고 상기 주름은 서로 밀착되게 마주하는 한 쌍의 직각삼각형상의 주름부(21,21)를 가진다. 그리고 상기 주름부들(21,21)은 관 몸체(1)의 내경부(11)와 동일평면을 이루면서 요입부(30)의 입구 양단(31,31)에 밀착되게 지지되는 평활지지부(22)를 통해 일체로 연결된다.As shown in Fig. 7 and 8, the corrugated steel pipe made in accordance with the present invention is a whole of the bellows-shaped corrugated body having a concave concave portion 30 in the inner diameter portion 11 of the tube body (1) Has The pleats have a pair of right triangle pleats 21 and 21 facing each other in close contact with each other. The wrinkles 21 and 21 form a flat support 22 that is in close contact with the inner ends 11 and 31 of the concave inlet 30 while forming the same plane as the inner diameter 11 of the tube body 1. It is connected integrally through.
따라서, 상기 평활지지부(22)는 양단이 직각삼각형을 이루는 주름부(21)의 빗변(21a)과 일체로 연결된 상태로 상기 요입부(30)의 입구를 완전히 폐쇄시켜 요입부(30)와 틈새없이 기밀을 유지하게 된다.Accordingly, the smooth support 22 has a gap between the recessed part 30 and the gap by completely closing the entrance of the recessed part 30 in a state in which both ends thereof are integrally connected to the hypotenuse 21a of the wrinkled part 21 forming a right triangle. Will remain confidential.
이와 같은 구조의 주름형 강관은 시공후 사용하는 과정에서 유체가 상기 본 발명 주름형 강관에 안내될 때, 관몸체(1)의 강도 향상을 위해 형성된 주름(20)의 요입부(30)가 틈새없이 기밀이 유지된 상태이므로 관 몸체(1)의 내경부(11)가 락심 연결부위를 제외한 나머지 부분이 매끄러운 평활상태가 된다. 따라서, 관 몸체(1)의 내부를 흐르는 유체는 양호한 흐름성을 갖게 됨은 물론 침전물도 쌓이지 않게 된다.The corrugated steel pipe of such a structure has a crevice 20 of the crease 20 formed to improve the strength of the tubular body 1 when the fluid is guided to the corrugated steel pipe of the present invention in the process of being used after construction. Since the airtight state is maintained without the inner diameter portion 11 of the tube body 1 is a smooth smooth state except the lock core connection portion. Therefore, the fluid flowing inside the tube body 1 not only has good flow, but also no sediment.
아울러, 외부로 노출된 주름(20)에 외력이 가해질 경우, 주름(20)의 강도가 구조적으로 견고하므로 주름(20)은 쉽게 손상되지 않게 된다.In addition, when an external force is applied to the wrinkles 20 exposed to the outside, since the strength of the wrinkles 20 is structurally strong, the wrinkles 20 are not easily damaged.
즉, 상기 주름(20)에 정압(F)이 인가되는 경우, 이 정압(F)은 양 주름부(21,21)를 이루는 빗변들(21a,21a)을 통해 요입부(30)의 입구 양단(31,31)으로 전달되는데, 상기 빗변들(21a,21a)은 일단이 서로 마주보면서 지지되어 있는 상태이고 타단이 요입부(30)의 입구 양단(31,31)에 지지되어 있기 때문에 양 주름부(21,21)의 상호간의 지지력을 통해 인가되는 정압(F)은 상쇄되면서 결국 주름(20)의 손상 및 변형은 최소화된다.That is, when the positive pressure (F) is applied to the pleats 20, the positive pressure (F) is the both ends of the inlet of the concave inlet portion 30 through the hypotenuses (21a, 21a) forming the pleats 21, 21 It is delivered to (31, 31), the hypotenuses (21a, 21a) is a state that one end is supported while facing each other and the other end is supported on both ends (31, 31) of the inlet end of the indentation 30 The positive pressure F applied through the mutual supporting force of the parts 21 and 21 cancels out, thereby minimizing damage and deformation of the wrinkles 20.
또한, 상기 주름(20)에 측압(F1)이 인가되는 경우, 이 측압(F1)은 일측의 주름부(21)의 직각면으로 작용하게 되는데, 각 주름부(21,21)는 마주보고 지지되어 있는 상태이고 측압(F1)이 인가되는 해당 주름부(21)의 빗변(21a)은 요입부(30)의 입구 단부(31)에 지지된 상태이므로 상기 측압(F1)은 해당 주름부(21)의 빗변(21a)을 따라 분산되는 동시에 맞은편 주름부(21)측으로 흡수된다. 따라서, 주름(20)의 손상 및 변형은 최소화된다.In addition, when the side pressure (F1) is applied to the pleats 20, the side pressure (F1) acts as a right angle surface of the pleats 21 on one side, each of the pleats 21, 21 are supported facing each other Since the hypotenuse 21a of the corrugation portion 21 to which the side pressure F1 is applied is supported by the inlet end 31 of the concave portion 30, the side pressure F1 corresponds to the corrugation portion 21. It is dispersed along the hypotenuse 21a of () and is absorbed to the opposite wrinkle part 21 side. Thus, damage and deformation of the pleats 20 are minimized.
아울러, 주름부(21)의 빗변(21a)을 통해 전달되는 외력(F,F1)의 대부분은 요입부(30)의 입구 양단(31,31)으로 흡수되므로 요입부(30)의 입구를 폐쇄하고 있는 평활지지부(22)는 외력의 영향을 거의 받지 않게 된다. 따라서, 상기 평활지지부(22)는 외력(F,F1)에 의한 손상 및 변형이 거의 발생되지 않게 되므로 관 내부를 흐르는 유체는 항상 양호한 흐름성을 갖게 된다.In addition, since most of the external force (F, F1) transmitted through the hypotenuse (21a) of the pleats 21 is absorbed by both ends (31, 31) of the inlet of the indentation 30, the inlet of the indentation 30 is closed The smooth support part 22 is hardly influenced by an external force. Therefore, since the damage and deformation caused by the external forces F and F1 hardly occur in the smooth support part 22, the fluid flowing in the tube always has good flowability.
이와 같이 구성된 주름형 강관은 다음과 같은 과정을 거쳐 제작된다.The corrugated steel pipe configured as described above is manufactured through the following process.
먼저 도 9에 도시된 바와 같이, 롤상태로 말아진 평판형태의 강판을 언코일러에 장착한 상태에서 상기 언코일러를 작동시키면 롤상태의 강판이 풀어지면서 일측에 있는 제1롤포밍기(100a)를 통과하는데, 이때 강판은 제1롤포밍기(100a)를 구성하는 다양한 성형롤러들(110~190)을 단계적으로 통과하면서 상기와 같은 주름을 갖도록 점진적으로 성형된다. 이때, 도 4에 도시된 바와 같이, 강판의 양측단부에 락심연결이 이루어지도록 하기 위한 연결고리(138)도 함께 성형된다.First, as shown in FIG. 9, when the uncoiler is operated in a state in which a plate-shaped steel sheet rolled in a roll state is mounted on an uncoiler, the first roll forming machine 100a on one side is released while the rolled steel sheet is released. In this case, the steel sheet is gradually formed to have a wrinkle as described above while passing through the various forming rollers (110 ~ 190) constituting the first roll forming machine (100a) step by step. At this time, as shown in Figure 4, the connecting ring 138 for forming the lock core connection to both ends of the steel sheet is also formed together.
따라서, 제1롤포밍기(100a)를 통과하여 주름이 성형된 강판을 제2롤포밍기(100b)에 통과시켜 나선상으로 말아 원통형상으로 성형하면서 상기 연결고리(138)를 락심연결하여 강판의 가장자리를 연결하면 관 몸체의 내경부에 나선 형태의 요입부를 일체로 갖는 복수의 주름을 구비한 주름형 강관이 완성되는 것이다.Therefore, the steel sheet formed by passing through the first roll forming machine (100a) to form a corrugation is passed through the second roll forming machine (100b) and rolled in a spiral shape to form a cylindrical shape while connecting the connecting ring 138 to the core of the steel sheet. When the edges are connected, a corrugated steel pipe having a plurality of corrugations having a spiral concave portion in the inner diameter portion of the tube body is completed.
이러한 제작방법을 수행하기 위한 본 발명의 주름형 강관의 제작장치는 기본적으로 언코일러와, 언코일에 롤상태로 말아진 평강판의 표면에 디귿자형태의 요입부가 일체화된 상태의 주름을 길이방향으로 형성시키는 제1롤포밍기(100a)와, 제1롤포밍기(100a)를 빠져나온 강판을 나선상으로 말아 원통형상으로 성형하는 제2롤포밍기(100b)를 구비하는데, 상기 제1롤포밍기(100a)을 제외한 나머지 언코일러와 제2롤포밍기(100b)은 종래와 동일하므로 여기서의 상세한 설명은 생략하기로 한다.The apparatus for manufacturing a corrugated steel pipe of the present invention for carrying out such a manufacturing method is basically the uncoiler and the wrinkles in the state in which the recessed portion of the recess shape is integrated on the surface of the flat steel plate rolled into the uncoil in the longitudinal direction. A first roll forming machine (100a) to form and a second roll forming machine (100b) for rolling a steel sheet exiting the first roll forming machine (100a) spirally to form a cylindrical shape, the first roll forming The rest of the uncoiler and the second roll forming machine 100b except for the machine 100a are the same as in the related art, and thus a detailed description thereof will be omitted.
도 10에 도시된 바와 같이, 상기 제1롤포밍기(100a)는 중앙에 각각 요부(113a)와 돌부(113b)(이하 '요철부'로 총칭함)가 형성된 제1,상,하형롤러(110)를 구비한다. 상기 제1,상,하형롤러(110)는 평강판의 두께에 해당하는 만큼 이격된 상태로 상기 요철부(113)를 통해 서로 맞물려 회전하도록 설치된다. 상기 제1롤포밍기(100a)로 투입된 평강판은 상기 제1,상,하형롤러(110) 사이를 통과하면서 표면에 요입부를 일체로 갖는 제1주름부(A)가 성형된다.As shown in Figure 10, the first roll forming machine (100a) is a first, upper, lower roller (formerly referred to as 'uneven portion') formed in the central portion 113a and protrusion 113b (hereinafter referred to as 'uneven portion') ( 110). The first, upper and lower rollers 110 are installed to be engaged with each other through the concave-convex portion 113 in a spaced apart state corresponding to the thickness of the flat steel plate. The flat plate inserted into the first roll forming machine 100a has a first wrinkle portion A having a recessed portion integrally formed on the surface thereof while passing between the first, upper and lower rollers 110.
한편, 상기 제1,상,하형롤러(110)는 제1주름부(A)의 원활한 성형을 위하여 평판의 진행방향으로 따라 요철부(113)의 길이가 단계적으로 증대되고 요철부(113)의 폭이 단계적으로 축소되도록 다단으로 설치되는 것이 바람직하다. 이 경우, 평강판은 다단으로 설치된 제1,상,하형롤러들(110,120)을 차례로 통과하면서 제1주름부(A)가 적정 높이까지 증대되고 적정 폭까지 축소된다.On the other hand, the first, the upper and lower die roller 110 is the step of increasing the length of the uneven portion 113 in the direction of the flat plate for smooth molding of the first wrinkles (A) step by step of the uneven portion 113 It is desirable to be provided in multiple stages so that the width is reduced in stages. In this case, as the flat plate passes through the first, upper and lower rollers 110 and 120 installed in multiple stages, the first wrinkle portion A increases to an appropriate height and is reduced to an appropriate width.
상기 제1,상,하형롤러(110)의 후방에는 원추상,하형롤러(130)가 배치된다. 상기 원추상형롤러(131)는 중앙에 제1상형롤러(111)와 동일한 요부(133a)를 가지며 양측으로 좁아지는 원추면(134)을 가진 몸체로 이루어진다. 상기 원추하형롤러(132)는 중앙에 제1하형롤러(112)와 동일한 돌부(133b)를 가지면서 양측으로 넓어지는 원추면(135)을 가진 몸체로 이루어진다. 상기 원추상,하형롤러(130)는 강판의 두께에 해당하는 만큼 이격된 상태로 배치됨은 물론이다. 상기 원추상,하형롤러(130)는 상기 제1,상,하형롤러(110)를 빠져나온 강판의 제1주름부(A)의 양측으로 외측으로 경사진 경사부(136)를 성형한다.At the rear of the first, upper and lower rollers 110, conical and lower rollers 130 are disposed. The conical roller 131 has a body having the same concave portion 133a as the first upper roller 111 in the center and the conical surface 134 narrowing to both sides. The lower conical roller 132 is composed of a body having a conical surface 135 widening to both sides having the same protrusion 133b as the first lower roller 112 in the center. The conical, lower die roller 130 is of course spaced apart as much as the thickness of the steel sheet. The conical and lower die rollers 130 form inclined portions 136 inclined outwardly to both sides of the first wrinkle portion A of the steel sheet exiting the first, upper and lower die rollers 110.
상기 원추상,하형롤러(130)의 후방에는 이중상,하형롤러(140)가 배치된다. 상기 이중상,하형롤러(140)는 중앙에 이격되게 형성된 한 쌍의 제1요철부(143)와 상기 제1요철부들(143,143) 사이에 위치하는 제2요철부(144)를 가진다. 상기 제1요철부(143)는 이중상형롤러(141)에 형성된 이중의 돌부(143a)와, 상기 돌부(143a)들에 대응되도록 이중하형롤러(142)에 형성된 이중의 요부(143b)로 이루어진다. 그리고, 제2요철부(144)는 상기 이중상형롤러(141)의 돌부(143a)와 돌부(143a) 사이에 상기 원추상형롤러(132)의 요부(133a)와 동일하게 형성된 요부(144a)와 이중하형롤러(142)의 요부(143b)와 요부(143b) 사이에 상기 원추하형롤러(132)의 돌부(133b)와 동일하게 형성된 돌부(144b)로 이루어진다.The double upper and lower rollers 140 are disposed at the rear of the conical and lower rollers 130. The double upper and lower rollers 140 have a pair of first uneven parts 143 and a second uneven part 144 positioned between the first uneven parts 143 and 143. The first concave-convex portion 143 includes a double protrusion 143a formed on the double upper roller 141 and a double recess 143b formed on the double lower roller 142 so as to correspond to the protrusions 143a. . In addition, the second uneven portion 144 has a recess 144a formed in the same manner as the recess 133a of the conical roller 132 between the protrusion 143a and the protrusion 143a of the dual roller 141. It consists of a protrusion 144b formed in the same manner as the protrusion 133b of the conical roller 132 between the recessed part 143b and the recessed part 143b of the double lowered roller 142.
이때, 상기 제1요철부(143)와 제2요철부(144)는 연속적으로 형성되어야 하며, 제1요철부(143)의 길이(h)는 제2요철부(144)의 길이(H) 보다 작고, 제1요철부(143)의 폭(w)은 제2요철부(144)의 폭(W) 보다 좁아야 한다. 상기 이중상,하형롤러(140)가 강판의 두께에 해당하는 만큼 이격된 상태로 배치됨은 물론이다.At this time, the first uneven portion 143 and the second uneven portion 144 should be formed continuously, the length (h) of the first uneven portion 143 is the length (H) of the second uneven portion 144 It is smaller and the width w of the first uneven portion 143 should be narrower than the width W of the second uneven portion 144. Of course, the double upper and lower rollers 140 are spaced apart as much as the thickness of the steel sheet.
상기 이중상,하형롤러(140)는 제1,2요철부(143,144)가 서로 맞물린 상태로 회전하면서 상기 원추상,하형롤러(130)를 빠져나온 강판의 경사부(136)에 제1주름부(A)와 반대방향으로 요입부를 일체로 갖는 한 쌍의 제2주름부(B)를 성형한다. 그리고 상기 제2주름부(B)가 원활하게 형성되도록 상기 이중상,하형롤러(140)는 제1,상,하형롤러(110)와 마찬가지로 다단으로 설치되는 것이 바람직하다.The double upper and lower die rollers 140 have a first pleated portion (1) on the inclined portion 136 of the steel sheet exiting the conical and lower die rollers 130 while rotating in a state where the first and second uneven parts 143 and 144 are engaged with each other. A pair of second wrinkles B having integrally recessed portions in the opposite direction to A) is molded. In addition, the dual upper and lower rollers 140 may be installed in multiple stages as the first, upper and lower rollers 110 so that the second wrinkles B may be smoothly formed.
상기 이중상,하형롤러(140)의 후방에는 제2상,하형롤러(160)가 배치된다. 상기 제2상,하형롤러(160)는 각각 중앙에 요부(163,164)가 형성된다. 상기 요부들(163,164)에는 각각 제1주름부(A)와 제2주름부(B)가 안착된다. 상기 요부들(163,164)는 제1주름부(A)와 제2주름부(B)가 여유있게 안착될 수 있도록 형성되며, 이중 제2하형롤러(162)에 형성된 요부(164)는 단일의 수평면(164a)과 한 쌍의 수직면(164b)으로 이루어진다. 상기 제2상,하형롤러(160)가 강판의 두께에 해당하는 만큼 이격된 상태로 배치됨은 물론이다.The second upper and lower die rollers 160 are disposed at the rear of the double upper and lower die rollers 140. The second upper and lower die rollers 160 have recesses 163 and 164 formed at their centers, respectively. First and second wrinkles A and B are seated on the recesses 163 and 164, respectively. The recesses 163 and 164 are formed to allow the first wrinkles A and the second wrinkles B to be seated in a relaxed manner, and the recesses 164 formed on the second lower roller 162 have a single horizontal surface. 164a and a pair of vertical surfaces 164b. Of course, the second upper and lower die rollers 160 are spaced apart as much as the thickness of the steel sheet.
이와 같이 구성된 상기 제2상,하형롤러(160)는 상기 이중상,하형롤러(140)를 빠져나온 강판의 제1주름부(A)의 상단을 하방으로 가압하게 되는데, 이로 인해 제1주름부(A)는 요입부의 입구가 서로 밀착됨과 동시에 상단이 평편하게 성형되며, 제2주름부(B)는 제2하형롤러(162)의 요부(164)의 수직면(164b)에 밀착되면서 서로 밀착되게 마주하는 한 쌍의 직각삼각형태로 성형된다.The second upper and lower die rollers 160 configured as described above presses the upper end of the first wrinkle part A of the steel sheet exiting the dual upper and lower die rollers 140 downwardly, thereby causing the first wrinkle part ( A) is the inlet of the indents are in close contact with each other at the same time the top is formed flat, the second wrinkles (B) are in close contact with each other while being in close contact with the vertical surface (164b) of the recessed portion 164 of the second lower roller (162). It is molded into a pair of right triangles.
한편, 제2상,하형롤러(160)는 제1,2주름부(A,B)의 원활한 성형을 위하여 상기 이중상,하형롤러(140)나 제1,상,하형롤러(110)와 같이 다단으로 설치되는 것이 바람직하다. 이 경우, 상기 제2상,하형롤러들(160,170,180)은 요부의 깊이가 단계적으로 작아지도록 다단으로 설치되어 평판의 진행방향에 따라 제1주름부(A)의 상단부가 점차로 낮아지면서 평편해지도록 성형한다.Meanwhile, the second upper and lower die rollers 160 are multi-stage like the double upper and lower die rollers 140 or the first and upper and lower die rollers 110 for smooth molding of the first and second wrinkles (A and B). It is preferable to install. In this case, the second upper and lower die rollers 160, 170, and 180 are installed in multiple stages so that the depth of the recess is gradually decreased, and the upper and lower ends of the first wrinkle portion A are gradually lowered in accordance with the traveling direction of the flat plate to be flattened. do.
또한, 이중상,하형롤러(140)와 제2상,하형롤러(160) 사이에는 제1,2주름부(A,B)의 원활한 성형을 위하여, 별도의 중간상,하형롤러(150)를 더 구비하는 것이 바람직하다. 상기 중간상형롤러(151)는 제2상형롤러(161)와 동일한 형태로 이루어지며, 중간하형롤러(152)는 제2상형롤러(161)의 요부(163) 중앙에 이중하형롤러(142)의 돌부(144b)보다 좁고 작은 크기의 돌부(155)가 형성된 형태로 이루어진다. 상기 중간상,하형롤러(150)가 강판의 두께에 해당하는 만큼 이격된 상태로 배치됨은 물론이다. 이와 같이 구성된 중간상,하형롤러(150)는 이중상,하형롤러(140)를 빠져나온 강판이 제2상,하형롤러(160)로 진입하기 전에 제1주름부(A)의 상단을 가압하여 제1주름부(A)의 요입부가 중간하형롤러(152)의 돌부(155)의 양측벽으로 밀착되게 성형시키며, 중간하형롤러(152)는 제2주름부(B)들이 중간하형롤러(152)의 요부(154)의 수직벽면에 밀착되도록 성형시켜 후행되는 제2상,하형롤러(160)의 성형작업이 수월하게 이루어지도록 예비성형을 수행한다.In addition, between the double upper and lower die rollers 140 and the second upper and lower die rollers 160, a separate intermediate upper and lower die rollers 150 are further provided for smooth molding of the first and second wrinkle parts A and B. It is desirable to. The intermediate upper roller 151 is formed in the same shape as the second upper roller 161, the intermediate lower roller 152 of the double lower roller 142 in the center of the main portion 163 of the second upper roller 161. A narrower and smaller sized protrusion 155 is formed than the protrusion 144b. Of course, the intermediate upper and lower die rollers 150 are spaced apart as much as the thickness of the steel sheet. The intermediate upper and lower rollers 150 configured as described above are pressurized on the upper end of the first wrinkle part A before the steel sheet exiting the dual upper and lower rollers 140 enters the second upper and lower rollers 160. The concave portion of the corrugated portion A is formed to be in close contact with both side walls of the protrusion 155 of the intermediate lower roller 152, and the intermediate lower roller 152 has the second wrinkles B of the intermediate lower roller 152. Preliminary molding is performed to facilitate the molding operation of the second upper and lower mold rollers 160, which are formed to be in close contact with the vertical wall surface of the recess 154.
본 발명에 따르면, 제2상,하형롤러(160)의 후방에는 제3상,하형롤러(190)가 배치된다. 상기 제3상형롤러(191)는 평롤러이고, 제3하형롤러(192)는 제2하형롤러(162)와 동일한 롤러이다. 따라서, 상기 제3상,하형롤러(190)는 제2상,하형롤러(160)를 빠져나온 강판의 제1주름부(A)가 강판의 표면과 동일평면을 이루도록 제1주름부(A)의 상단을 완전히 가압하여 제1주름부(A)가 각 제2주름부(B)의 요입부의 입구 양단(B1,B1)에 밀착되게 지지되면서 상기 제2주름부(B)의 요입부를 틈새없이 막아 제2주름부(B)와 일체를 이루는 평활지지부가 되도록 성형시킨다. 상기 제3상,하형롤러(190)가 강판의 두께에 해당하는 만큼 이격된 상태로 배치됨은 물론이다.According to the present invention, the third upper and lower rollers 190 are disposed behind the second upper and lower rollers 160. The third upper roller 191 is a flat roller, the third lower roller 192 is the same roller as the second lower roller 162. Accordingly, the third upper and lower die rollers 190 have a first wrinkle portion A such that the first wrinkle portion A of the steel sheet exiting the second upper and lower die rollers 160 is coplanar with the surface of the steel sheet. By fully pressing the upper end of the first wrinkle portion (A) is supported in close contact with the inlet end (B1, B1) of the inlet portion of each of the second wrinkle portion (B) while the recess portion of the second wrinkle portion (B) without a gap It prevents and shape | molds so that the smooth support part which may be integrated with the 2nd wrinkle part B may be. Of course, the third upper and lower die rollers 190 are spaced apart as much as the thickness of the steel sheet.
이와 같이 구성된 본 발명의 주름형 강관의 제작장치를 이용하면 다음과 같은 방법을 통해 주름형 강관을 성형할 수 있다.Using the apparatus for producing a corrugated steel pipe of the present invention configured as described above can form a corrugated steel pipe through the following method.
먼저, 롤상태로 말아진 평판형태의 강판을 언코일러에 장착한 후 상기 언코일러를 작동시켜 말아진 강판을 풀고 풀어진 평강판을 제1롤포밍기(100a)에 투입한다.(S1)First, after mounting the plate-shaped steel sheet rolled in an uncoiler, the uncoiler is operated to release the rolled steel sheet, and the released flat steel sheet is put into the first roll forming machine 100a. (S1)
이렇게 하면, 제1롤포밍기(100a)로 투입된 평강판은 제1,상,하형롤러(110)를 통과하면서 평강판 표면에 요입부를 일체로 갖는 제1주름부(A)가 성형된다.(S2)In this way, the first steel sheet (A) having a recessed portion integrally formed on the surface of the flat steel plate is passed through the first, upper, lower die roller 110, the flat plate introduced into the first roll forming machine (100a). S2)
이와 같이 제1주름부(A)가 형성된 강판은 원추상,하형롤러(130)를 통과하게 되며, 이 과정에서 상기 제1주름부(A)의 양측이 원추상,하형롤러(130)에 눌리면서 외측으로 경사진 한 쌍의 경사부(136)가 성형된다.(S3)As described above, the steel sheet on which the first wrinkle portion A is formed passes through the conical and lower rollers 130. In this process, both sides of the first wrinkle portion A are pressed by the conical and lower rollers 130. A pair of inclined portions 136 inclined outward are formed. (S3)
경사부(136)가 형성된 강판은 이중상,하형롤러(140)를 통과하게 되며, 이 과정에서 상기 각 경사부(136)가 이중상,하형롤러(140)에 눌리면서 제1주름부(A)와 반대방향이면서 요입부를 일체로 갖는 한 쌍의 제2주름부(B)로 성형된다.(S4)The steel sheet having the inclined portion 136 is formed to pass through the double upper and lower rollers 140, and in this process, the inclined portions 136 are pressed by the dual upper and lower rollers 140, and are opposite to the first wrinkles A. Is formed into a pair of second wrinkles B having both the direction and the recess in one body. (S4)
한편, 이중상,하형롤러(140)의 후방에 제2상형롤러(161)와 동일한 형태의 중간상형롤러(151)와 제2하형롤러(162)의 요부(164) 중앙에 돌부가 형성된 형태의 중간하형롤러(152)가 더 구비된 경우에는, 중간상형롤러(151)가 이중상,하형롤러(140)를 빠져나온 강판이 제2상,하형롤러(160)로 진입하기 전에 제1주름부(A)의 상단을 가압하여 제1주름부(A)의 요입부가 중간하형롤러(152)의 돌부(155)의 양측벽으로 밀착되게 성형시킴과 동시에 중간하형롤러(152)가 제2주름부(B)들이 중간하형롤러(152)의 요부의 수직벽면에 밀착되도록 성형할 수도 있다. 따라서, 후행되는 제2상,하형롤러(160)의 성형작업이 수월해지게 된다.On the other hand, in the middle of the form of the intermediate upper roller 151 of the same shape as the second upper roller 161 and the recessed portion 164 in the center of the second lower roller 162 in the rear of the double upper, lower mold roller 140 When the lower die roller 152 is further provided, the first wrinkle portion A before the middle upper roller 151 enters the second upper and lower die roller 160 from the dual phase and the lower die roller 140. ) By pressing the upper end of the first wrinkle portion (A) to be in close contact with both side walls of the protrusion 155 of the intermediate lower roller 152 and at the same time the intermediate lower roller (152) second wrinkles (B) ) May be molded to be in close contact with the vertical wall surface of the recessed portion of the intermediate roller. Therefore, the subsequent forming operation of the second upper and lower die rollers 160 is facilitated.
제2주름부(B)가 성형된 강판은 제2상,하형롤러들(160)를 통과하게 되며, 이 과정에서 상기 제1주름부(A)의 상단이 제2상형롤러(161)에 의해 1차 가압되면서 평편하게 성형되는 동시에 상기 가압력에 의해 제2주름부(B)가 수평면(164a)과 한 쌍의 수직면(164b)으로 이루어진 제2하형롤러(162)의 홈부(164) 내벽면에 밀착되면서 서로 밀착되게 마주하는 한 쌍의 직각삼각형으로 성형된다.The steel sheet formed with the second wrinkle part B passes through the second upper and lower mold rollers 160, and in this process, the upper end of the first wrinkle part A is formed by the second upper mold roller 161. At the same time, the first wrinkle is formed flat and at the same time, the second wrinkle portion (B) is formed on the inner wall surface of the groove portion 164 of the second lower die roller 162 formed of a horizontal surface 164a and a pair of vertical surfaces 164b. While being in close contact, they are molded into a pair of right triangles facing each other.
제2상,하형롤러(160)를 통과하여 제2주름부(B)가 서로 밀착되게 마주하는 한 쌍의 직각삼각형으로 성형된 강판은 제3상,하형롤러(190)를 통과하게 되는데, 이 과정에서 제1차 가압된 제1주름부(A)의 상단이 2차 가압되면서 상기 제1주름부(A)는 제2주름부(B)의 요입부의 입구(B1,B1)에 완전히 밀착됨과 동시에 강판의 표면과 동일평면을 이루도록 성형된다. 따라서, 제1주름부(A)에 의해 제2주름부(B)의 요입부는 틈새가 없이 기밀을 유지할 수 있게 된다.(S5)The steel sheet formed by a pair of right angled triangles facing the second upper and lower die rollers 160 to be in close contact with each other to pass through the third upper and lower die rollers 190, In the process, the upper end of the first pressurized first wrinkle portion (A) is pressurized secondly and the first wrinkle portion (A) is completely in close contact with the inlets (B1, B1) of the indentation portion of the second wrinkle portion (B) and At the same time, it is molded to form the same plane as the surface of the steel sheet. Therefore, the recessed part of the 2nd wrinkle part B by the 1st wrinkle part A can be kept airtight without a gap. (S5)
이후, 상기 제1,2주름부(A,B)가 길이방향으로 형성됨과 함께 연결고리(138)가 형성된 강판을 제2롤포밍기(100b)에 통과시키면, 상기 강판은 금형의 구조적 작용으로 인해 내부에서 나선상으로 말아지면서 원통형상으로 관 몸체(1)를 이루어 결국 도 7 및 도 8과 같은 구조의 주름형 강관이 얻어진다.(S6)Thereafter, when the first and second wrinkles (A, B) are formed in the longitudinal direction and the steel sheet having the connection ring 138 is passed through the second roll forming machine (100b), the steel sheet is a structural action of the mold Due to the spirally wound inside the tubular body (1) to form a tubular corrugated steel pipe of the structure as shown in Figure 7 and 8 is obtained. (S6)
한편, 상기한 과정에서 강판이 제1롤포밍기(100a)를 통과하면서 길이방향을 따라 요입부가 일체화된 상태의 제1주름부(A)와 제2주름부(B)가 성형될 때, 상기 강판의 양측단부에는 락심연결이 이루어지도록 하기 위한 연결고리(138)도 함께 성형될 수 있다. 이 경우, 상기 제1주름부(A)와 제2주름부(B)가 길이방향으로 형성됨과 함께 양측단부에 연결고리(138)가 형성된 상태의 강판을 제2롤포밍기(100b)에 통과시키면, 제2롤포밍기(100b)의 구조적 작용으로 인해 강판이 제2롤포밍기(100b)에서 나선상으로 말아지면서 그 경계부분이 연결고리(138)에 의해 락심연결되며, 이에 따라 상기 강판은 제1,2주름부(A,B)가 형성된 상태에서 원통형상으로 관 몸체를 이루며 결국 도 7 및 도 8과 같은 구조의 주름형 강관이 된다.On the other hand, when the first wrinkle portion (A) and the second wrinkle portion (B) in the state in which the concave portion is integrated in the longitudinal direction while the steel sheet passes through the first roll forming machine (100a) in the above process, the Both ends of the steel sheet may be molded together with a connecting ring 138 for the lock core connection is made. In this case, the first wrinkle portion (A) and the second wrinkle portion (B) is formed in the longitudinal direction and pass through the second roll forming machine (100b) the steel sheet with the connecting ring 138 is formed at both ends Then, due to the structural action of the second roll forming machine (100b) the steel sheet is rolled spirally in the second roll forming machine (100b) and the boundary portion is the lock core connection by the connecting ring 138, accordingly the steel sheet is In the state where the first and second wrinkles (A, B) is formed, the tubular body is formed in a cylindrical shape and eventually becomes a corrugated steel pipe having a structure as shown in FIGS. 7 and 8.
이와 같이, 도면을 참조하여 본 발명의 바람직한 실시예에 대해 상술하였으나 본 발명은 전술한 실시예에 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진자가 본 발명의 사상을 벗어나지 않고 변형 가능하며, 이러한 변형은 본 발명의 권리범위에 속할 것이다.As described above, preferred embodiments of the present invention are described above with reference to the drawings, but the present invention is not limited to the above-described embodiments, and those skilled in the art may modify the present invention without departing from the spirit of the present invention. Possible, such modifications will fall within the scope of the invention.

Claims (8)

  1. 제1롤포밍기에 평강판을 투입하는 단계;Injecting a flat plate into the first roll forming machine;
    평강판 표면에 요입부를 일체로 갖는 제1주름부를 성형하는 단계;Forming a first wrinkle part having a recess in the flat steel plate surface;
    상기 제1주름부의 양측에 외측으로 경사진 한 쌍의 경사부를 성형하는 단계;Forming a pair of inclined portions inclined outward on both sides of the first wrinkle portion;
    상기 각 경사부를 제1주름과 반대방향이면서 요입부를 일체로 갖는 이격된 한 쌍의 제2주름부로 성형하는 단계;Shaping each of the inclined portions into a pair of spaced apart second wrinkle portions that are opposite to the first wrinkles and have a recess portion;
    상기 제1주름부의 상단을 1차 가압하여 상기 제2주름부를 서로 밀착되게 마주하도록 성형하는 단계;Pressing the first upper end of the first wrinkle part to form the second wrinkle part in close contact with each other;
    제1주름부의 상단을 2차 가압하여 상기 제1주름부의 상단이 강판의 표면과 동일평면을 이루면서 제2주름부의 요입부에 밀착되도록 성형하는 단계; 및Pressing the second upper end of the first wrinkle part to form the upper end of the first wrinkle part to be in close contact with the recess of the second wrinkle part while forming the same plane as the surface of the steel sheet; And
    상기 강판을 제2롤포밍기에 통과시켜 나선상으로 말아 원통형상으로 성형하는 단계를 포함하여 구성됨을 특징으로 하는 주름형 강관의 제작방법.Passing the steel sheet through a second roll forming machine, the method of producing a corrugated steel pipe, characterized in that it comprises a step of forming in a spiral rolled in a cylindrical shape.
  2. 제 1항에 있어서,The method of claim 1,
    상기 제1롤포밍기에 평강판을 투입하는 단계 이후에 제1주름부와 제2주름부의 성형시 강판의 양측단부에 락심연결이 이루어지도록 하기 위한 연결고리도 함께 성형되도록 하는 단계를 더 거치도록 하고,After the step of inserting the flat plate into the first roll forming machine to the step of forming the first ring portion and the second wrinkle portion when forming the connecting ring for forming the lock core connection at both ends of the steel sheet further ,
    상기 강판을 제2롤포밍기에 통과시켜 나선상으로 말아 원통형상으로 성형하는 단계에서 상기 강판은 경계부분이 연결고리에 의해 락심 연결되어 원통형상으로 관 몸체를 이루도록 성형되는 것을 특징으로 하는 주름형 강관의 제작방법.Wherein the steel sheet is passed through a second roll forming machine to form a cylindrical shape rolled in a spiral form the steel sheet is formed to form a tubular body in a cylindrical shape by connecting the lock portion of the steel core by the connecting ring of the corrugated steel pipe How to make.
  3. 언코일러와, 언코일에 롤상태로 말아진 평강판의 표면에 디귿자형태의 요입부가 일체화된 상태의 주름을 길이방향으로 형성시키는제1롤포밍기와, 제1롤포밍기를 빠져나온 강판을 나선상으로 말아 원통형상으로 성형하는 제2롤포밍기를 구비한 주름형 강관의 제작장치에 있어서,The uncoiler, the first roll forming machine for forming the wrinkles in the longitudinal direction in which the recessed portion of the recessed portion is integrated on the surface of the flat steel plate rolled in the uncoil, and the steel sheet exiting the first roll forming machine in a spiral shape In the manufacturing apparatus of the corrugated steel pipe having a second roll forming machine to be rolled into a cylindrical shape,
    상기 제1롤포밍기가,The first roll forming machine,
    중앙에 형성된 요철부를 통해 서로 맞물려 회전하면서 평강판 표면에 요입부를 일체로 갖는 제1주름부를 성형하는 제1상,하형롤러;First upper and lower die rollers which engage with each other through the concave and convex portions formed at the center thereof to form a first wrinkle portion having the concave portions integrally on the flat steel plate surface;
    제1상,하형 후방에 배치되어 상기 제1주름부의 양측으로 외측으로 경사진 경사부를 성형하는 원추상,하형롤러;Conical, lower die rollers disposed behind the first upper and lower dies to form inclined portions inclined outwardly to both sides of the first pleats;
    중앙에 이격되게 형성된 한 쌍의 요철부를 통해 서로 맞물려 회전하면서 상기 경사부에 제1주름과 반대방향으로 요입부를 일체로 갖는 한 쌍의 제2주름부를 성형하는 이중상,하형롤러;A dual upper and lower die rollers which engage with each other through a pair of uneven parts formed at a center thereof and rotate to form a pair of second wrinkle parts having a concave part in a direction opposite to the first wrinkles on the inclined part;
    중앙에 제2주름보다 큰 폭을 갖는 요부를 가지며, 상기 요부에 제1주름부와 제2주름부를 안착시킨 상태에서 제1주름부를 하방으로 1차 가압하여 상기 제2주름부들이 홈부내에서 서로 밀착되게 마주하도록 성형시키는 제2상,하형롤러; 및In the center has a recess having a width larger than the second wrinkles, the first wrinkles are first pressed downward in the state in which the first wrinkles and the second wrinkles are seated on the recesses so that the second wrinkles are mutually A second upper and lower roller configured to be formed in close contact with each other; And
    제2상,하형롤러의 후방에 위치되어 상기 제1주름부를 하방으로 2차 가압하여 제1주름부의 상단을 강판의 표면과 동일평면을 이루면서 각 제2주름부의 요입부의 입구 양단에 밀착되게 지지되어 상기 요입부가 틈새 없이 기밀을 유지할 수 있도록 성형시키는 제3상,하형롤러를 포함하여 이루어진 것을 특징으로 하는 주름형 강관의 제작장치.Located at the rear of the second upper and lower die rollers, the second wrinkle part is pressurized downward to support the upper end of the first wrinkle part in the same plane as the surface of the steel sheet and to be in close contact with both ends of the inlet of each recess of the second wrinkle part. Apparatus for producing a corrugated steel pipe, characterized in that comprises a third upper, lower die roller for molding so as to maintain the airtight without gaps.
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 제3상형롤러는 평롤러인 것을 특징으로 하는 주름형 강관의 제작장치.The third phase roller is a flat roller manufacturing apparatus, characterized in that the roller.
  5. 제 3항에 있어서,The method of claim 3, wherein
    상기 제2하형롤러에 형성된 요부는 단일의 수평면과 한 쌍의 수직벽으로 이루어진 것을 특징으로 하는 주름형강관의 제작장치.The recessed part formed on the second lower roller has a single horizontal surface and a pair of vertical walls.
  6. 제 3항에 있어서,The method of claim 3, wherein
    이중상,하형롤러는 중앙에 이격되게 형성된 한 쌍의 제1요철부와, 제1요철부 사이에 형성된 제2요철부를 구비한 것을 특징으로 하는 주름형 강관의 제작장치.The double upper and lower rollers have a pair of first uneven portions formed in the center and a second uneven portion formed between the first uneven portions.
  7. 제 6항에 있어서,The method of claim 6,
    상기 제1요철부와 제2요철부는 연속적으로 형성되며,The first uneven portion and the second uneven portion are formed continuously,
    상기 제1요철부의 길이는 제2요철부 보다 작고, 제1요철부의 폭은 제2요철부 보다 좁은 것을 특징으로 하는 주름형 강관의 제작장치.The length of the first concave-convex portion is smaller than the second concave-convex portion, the width of the first concave-convex portion manufacturing apparatus of the corrugated steel pipe, characterized in that narrower than the second concave-convex portion.
  8. 제 3항에 있어서,The method of claim 3, wherein
    상기 이중상,하형롤러와 제2상,하형롤러 사이에는 제2상형롤러와 동일한 형태로 이루어진 중간상형롤러와, 제2형상형롤러의 요부 중앙에 제1주름부의 요입부 중앙에 위치되는 돌부가 형성된 형태로 이루어진 중간하형롤러가 배치된 것을 특징으로 하는 주름형 강관의 제작장치.An intermediate upper roller having the same shape as the second upper roller, and a protrusion positioned at the center of the recess of the first fold portion are formed between the double upper and lower rollers and the second upper roller. Apparatus for producing corrugated steel pipe, characterized in that the intermediate lower roller made of a form.
PCT/KR2010/009138 2010-01-08 2010-12-21 Method and apparatus for manufacturing a corrugated steel pipe WO2011083925A2 (en)

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