KR101868514B1 - Machining apparatus of steel sheet for steel pipe and processing method thereof - Google Patents

Machining apparatus of steel sheet for steel pipe and processing method thereof Download PDF

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Publication number
KR101868514B1
KR101868514B1 KR1020170176809A KR20170176809A KR101868514B1 KR 101868514 B1 KR101868514 B1 KR 101868514B1 KR 1020170176809 A KR1020170176809 A KR 1020170176809A KR 20170176809 A KR20170176809 A KR 20170176809A KR 101868514 B1 KR101868514 B1 KR 101868514B1
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South Korea
Prior art keywords
frame
pair
steel plate
main body
roulette
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KR1020170176809A
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Korean (ko)
Inventor
홍걸
Original Assignee
건일스틸 주식회사
홍걸
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Priority to KR1020170176809A priority Critical patent/KR101868514B1/en
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Publication of KR101868514B1 publication Critical patent/KR101868514B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B21H8/005—Embossing sheets or rolls

Abstract

The present invention relates to an apparatus to process a steel sheet for a steel pipe, capable of knurling a surface of a steel sheet at a predetermined depth and shape to make painting or coating performed well on the surface of the steel pipe to be used for a steel pipe for waterworks; and a processing method thereof. According to the present invention, the apparatus to process a steel sheet comprises: a body to mount a steel sheet to be processed and including a plurality of first ball screw members; a first frame to move on the body in the width direction (X direction) of the body and having a plurality of roulette holders mounted to form knurling on the steel sheet; a plurality of second frames mounted on the pair of first ball screw members, respectively, to move on the body in the longitudinal direction (Z direction) of the body; a third frame mounted between the pair of second frames and including a second ball screw members moving the first frame in the width direction (X direction) of the body, wherein a gap between the pair of roulette holders is the half of the length of the steel sheet to be processed. Accordingly, a knurling work of the steel sheet is able to be realized at high speed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel sheet for steel pipe,

The present invention relates to an apparatus for working a steel plate for a steel pipe and a method of processing the steel plate, and more particularly to a method for forming a knurling at a predetermined depth and shape on a surface of a steel plate, And more particularly, to a machining apparatus and method for machining a steel plate for a steel pipe.

In general, the inner and outer surfaces of the steel pipe are required to be protected against contamination by transporting fluids and environment suitable for the laying environment so that the steel pipe itself can be protected from corrosion. Coating and lining method is the most commonly applied method, which directly affects the safety and lifespan of steel pipes. Therefore, the quality of the coating material used directly for the coating and the coating technique for coating the coating material on the steel pipe are very important Do.

Particularly, in the case of water pipes for tap water, the quality of tap water flowing in the steel pipes directly affects the public health, so both domestic and foreign companies are required to satisfy coating materials and coating techniques of a certain quality standard or more. (KS D 3550) and the national standard for general purpose steel pipes (KS D 3626), the inner surface coating material is mainly composed of liquid epoxy (KS D 8502) single item However, there is a case where the coating material is peeled due to weak adhesive force of the coating film and since the solvent containing components such as benzene and toluene is used, there is no need to develop alternative coating materials and techniques It is still used for water service.

A steel pipe having a three-layer coating layer composed of three layers of an epoxy adhesive (FBE; Fusion Bonded Epoxy) layer, a polyethylene adhesive (PE Adhesive) layer and a polyethylene (PE) .

On the other hand, in order to obtain a sandblasting effect so as to apply the paint to the steel pipe smoothly after removing the rust and blackness caused by the corrosion on the surface of the steel pipe or the steel plate and smoothly brushing the inner circumferential surface of the steel pipe, A surface treatment process for forming a fine rough surface is performed as a blasting apparatus. Such a blasting apparatus is configured to be able to travel from the surface of a given steel pipe or steel plate to be subjected to a surface treatment by driving a separately prepared surface treatment apparatus at its leading end or trailing end.

One example of such a technique is disclosed in Patent Document 1 or 2 below.

For example, the following Patent Document 1 discloses a rolling mill having a support plate having a predetermined size and having a rail, a rotating portion rotatably installed on the upper surface of the receiving plate, And a movement pushing unit for moving the wheel along a bottom surface of the rail by a rotation of the motor, and a moving unit for moving the upper surface of the rail, A second frame vertically fixed to the first frame, a lattice holder fixed to an inner surface of the steel pipe at a predetermined height of the second frame, A third frame to be fixed, a cylinder provided at a lower portion of the third frame for pressurizing the Lorette holder, An inner surface machining apparatus is disclosed.

1, the gap member 2 and the fixed block 3 are alternately provided on the rotary shaft 1 of the blasting device, and the fixed member 3 is fixed to the fixing block 3 In the surface treatment unit 10 provided between the shafts 4 and performing roughing work on the surface of the steel pipe and the steel plate as the rotation of the rotating shaft 1, the surface treatment unit 10 is arranged so as to be guided to the fixed shaft 4 And a plurality of straight pins are integrally extended from the ring so that a plurality of rings can be movably installed from the fixed shaft 4 so as to be in close contact with each other. The diameter of the ring is larger than the diameter of the fixed shaft 4 A large surface treatment unit is disclosed.

Korean Registered Patent No. 10-1513996 (Registered on Apr. 15, 2015) Korean Registered Patent No. 10-1366504 (Registered on Feb. 18, 2014)

However, Patent Document 1 as described above is filed and registered by the applicant of the present invention, and it is possible to form the groove portion with a certain depth and shape on the inner surface of the steel pipe. However, in order to rotate the steel pipe to form such a groove portion, There is a problem that it is difficult to accurately form a groove portion on the inner surface of the steel pipe and confirm it.

Further, in the technique disclosed in the above-mentioned Patent Document 2, since a surface treatment unit provided with a plurality of rings is used, there is a problem in that the structure of the equipment is complicated and the surface of the steel sheet can not be treated regularly.

The blasting treatment with compressed air on the surface of the steel sheet, such as sand, steel shot, grit, or water to which abrasives such as sand or silica particles are added, may be removed by sand, water, There is a problem that it is necessary to work only within a specific space, and there is a problem that an additional equipment for collecting the scattering material is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a machining apparatus and a machining method for a steel plate for a steel pipe capable of precisely and accurately performing a knurling operation on the steel plate.

Another object of the present invention is to provide a machining apparatus for a steel plate for a steel pipe capable of continuously performing a knurling operation of the steel plate and a machining method therefor.

In order to achieve the above object, the present invention provides a steel plate processing apparatus for a steel pipe, comprising: a main body having a pair of first ball screw members mounted with steel plates to be machined; A first frame on which a pair of roulette holders are mounted for forming knurling on the steel plate, a pair of first ballscrews for moving in the longitudinal direction (Z direction) of the main body on the main body, And a second ball screw member mounted between the pair of second frames for moving the first frame in the width direction (X direction) of the main body, 3 frames, and the spacing of the pair of roulette holders is 1/2 of the length of the steel sheet to be processed.

Further, in the apparatus for working a steel plate for a steel pipe according to the present invention, the main body is provided with an insert portion formed such that the surface of the steel plate is positioned above the surface of the main body, and the insert is provided with elasticity during the knurling operation And an elastic member is provided.

In the machining apparatus for a steel plate for a steel pipe according to the present invention, the first frame is provided with a first cylinder for applying a pressure to the pair of roulette in the vertical direction (Y direction) Characterized in that a cylinder is mounted.

In the machining apparatus for a steel plate for a steel pipe according to the present invention, a third cylinder for moving one roulette holder is mounted on the first frame so that the interval between the pair of roulette holders extends in the longitudinal direction (Z direction) .

Further, in the machining apparatus for a steel plate for a steel pipe according to the present invention, it further includes a control member for controlling the movement of the first frame and the pair of second frames, and for controlling the pressures of the first to third cylinders, The control member controls the first frame to reciprocate in the width direction (X direction) of the main body in the third frame, and the control member controls the second frame in the longitudinal direction of the main body Z direction), and the control member is moved in the width direction (X direction) of the body of the first frame, and then the pair of second frames is moved in the longitudinal direction of the body by a length corresponding to the width of the roulette Z direction).

In order to achieve the above object, the present invention also provides a method for machining a steel plate for a steel pipe, comprising the steps of: (a) mounting a steel plate having a length and a width to be machined in the main body; (b) Placing a first frame on a pair of roulettes and applying pressure in a vertical direction (Y direction) of the steel strip to a pair of roulettes to bring the pair of roulette and the first and second parts in close contact with each other c) moving the first frame in a state in which the pair of roulette is in close contact with the first portion and the second portion in the step (b), and knurling the first frame in the first direction in the width direction (X direction) knurling) in the width direction (X direction); (d) after the knurling in the first direction in the width direction (X direction) is completed in the step (c) (D) moving in a first direction (Z direction) in the longitudinal direction (X) in a width direction (X direction) opposite to the first direction in the width direction (X direction) after the movement of the first frame in the width direction And moving the pair of second frames in a first direction in the longitudinal direction (Z direction) of the steel plate after the knurling in the first direction (X direction) is completed, and the steps (c) to ) Is repeatedly performed to form a knurling on the entire surface of the steel sheet.

Further, in the method of working a steel sheet for a steel pipe according to the present invention, knurling of the other steel sheet after completion of knurling of one steel sheet is carried out by forming a pair of second frames in a first direction in the longitudinal direction (Z direction) (Z direction), which is the opposite direction.

As described above, according to the present invention, a pair of roulette holders are provided, and the interval between the pair of roulettes is set to 1/2 of the length of the steel plate to be machined The knurling operation can be performed simultaneously at two places of the steel sheet, and the knurling operation of the steel sheet can be realized at a high speed.

According to the present invention, there is provided a working apparatus for a steel plate for a steel pipe and a method of working the same, wherein the steel plate is knurled by moving the second frame in one direction about 1/2 of the length of the steel plate, The knurling operation of the second steel plate can be performed, and the energy consumption due to the movement of the second frame can also be reduced.

Further, according to the present invention, since the size of the pair of rollers is provided in correspondence with the optimization of the knurling operation for the steel plate and is mounted on the support stand interchangeably, the accuracy of the knurling Can be increased.

1 is a front view showing a main part of a blasting apparatus according to the prior art,
FIG. 2 is a view for explaining a state of a steel plate according to the present invention manufactured as a steel pipe after surface treatment,
3 is a perspective view of a machining apparatus for a steel plate for a steel pipe according to an embodiment of the present invention,
4 is a view showing a state in which a pair of first ball screw members are mounted on the left and right sides of the main body,
5 is a view showing a state in which a pair of roulette holders are in close contact with a steel plate in the first frame,
6 is a view showing a state in which a second frame is coupled to a pair of first ball screw members,
7 is a view showing a configuration of a second ball screw member mounted on a third frame,
8 is a block diagram for explaining a control process of a machining apparatus for a steel plate for a steel pipe according to the present invention,
Fig. 9 is a view for explaining a procedure of machining by a machining apparatus for a steel plate for a steel pipe according to the present invention,
10 is a perspective view of a machining apparatus for a steel plate for a steel pipe according to another embodiment of the present invention.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

The term "steel plate" used in the present invention is a steel plate to be used as a sewer or a water pipe for steelworks. The "steel pipe" And then welded after welding. The length and width of the steel sheet have a size corresponding to the standard of the water supply steel pipe having a diameter of approximately 300 to 3,000 mm.

First, the concept of manufacturing a steel sheet for a steel pipe according to the present invention will be described with reference to FIG.

Fig. 2 is a view for explaining a state of the steel plate according to the present invention made of a steel pipe after surface treatment. Fig.

2 (a), a roulette is used as shown in Fig. 2 (b) on the surface of a steel plate 50 provided in a flat state, as shown in Fig. 2 Thereby forming a knurling 51. A portion of the steel plate 50 on which the knurl 51 is formed according to the present invention is provided with a protective coating layer such as a liquid epoxy or the like and then the knurl 51 is formed by a conventional welding method or the like as shown in Fig. And is formed into a steel pipe 52 so that the forming portion is inside.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a working apparatus for a steel plate for a steel pipe according to the present invention will be described with reference to the drawings.

FIG. 3 is a perspective view of a machining apparatus for a steel plate for a steel pipe according to an embodiment of the present invention, FIG. 4 is a view showing a state where a pair of first ball screw members are mounted on left and right sides of the main body, FIG. 6 is a view showing a state in which a pair of roulette holders are closely attached to a steel plate in a frame, FIG. 6 is a view showing a state in which a second frame is coupled to a pair of first ball screw members, and FIG. Fig. 7 is a view showing a configuration of a second ball screw member.

3, the apparatus for machining a steel plate for a steel pipe according to an embodiment of the present invention includes a main body 100 having a steel plate 50 to be machined and a pair of first ball screw members 60, A first frame 200 movable in a width direction (X direction) of the main body 100 on the main body 100 and equipped with a pair of roulette holders 70 for forming a knurling on the steel plate 60, A pair of second frames 300 mounted on the pair of first ball screw members 60 so as to move in the longitudinal direction (Z direction) of the main body 100 on the main body 100, 300 and a third frame 400 having a second ball screw member 410 for moving the first frame 200 in the width direction (X direction) of the main body.

As shown in FIGS. 3 and 4, the main body 100 is formed in a substantially rectangular flat plate. In the central portion of the main body 100, a steel plate 50 is inserted into the main body 100 such that the surface thereof is positioned above the surface of the main body 100 120 and one side of the main body 100 is formed to be openable and closable for mounting and pulling out the steel plate 50 as shown in FIG. That is, for example, the left side portion of FIG. 3 can be formed to be openable and closable by the hinge 110.

A pair of first ball screw members 60 are provided on both sides of the insertion portion 120 provided in the main body 100. The insertion portion 120 is provided with an elastic member 130 for maintaining the elasticity during the knurling operation of the steel plate 50. That is, in the present invention, the elastic member 130 supports the lower portion of the steel plate 50, thereby increasing the efficiency of the knurling operation on the steel plate 50 and preventing the surface of the steel plate 50 from being damaged . The elastic member 130 may be made of a material capable of maintaining elasticity by repeated knurling operation on the steel plate 50, and is not limited to a specific material. A plurality of springs may be applied to the elastic member 130.

The ball screw member 60 is configured to move a pair of roulette holders 70 for forming a knurling 51 on the steel plate 50 in the longitudinal direction (Z direction) of the main body 100, As shown in FIG. 3, the ball screw member 60 is provided with a rail slot 65 for moving the second frame 300 in the vertical direction in FIG. 6, the ball screw member 60 includes a ball screw shaft 61 driven by a motor, a motor bracket 62 fixed to the main body 100 and provided at one end of the ball screw shaft 61 An end bracket 63 fixed to the main body 100 and provided at the other end of the ball screw shaft 61 to support the ball screw shaft 61, And a nut bracket 64 screwed to the shaft 61. The ball screw shaft 61 rotates and moves the second frame 300 by the rotational force from the motor under the control of the control unit. 4, in order to speed up the formation of the null ring 51, the nut bracket 64 is disposed at a position about half the length of the steel plate 50 and at the initial position, And the second frame 300 is mounted on the two nut brackets 64 to stably support the roulette holder 70 during the knurling operation by the first frame 200. [ That is, each of the pair of second frames 300 is integrated by two connecting legs and two legs coupled to the two nut brackets 64 as shown in FIG. 6, Shape. Therefore, it is possible to move more precisely in the longitudinal direction (Z direction) of the main body from the ball screw shaft 61 by the constitution of "C" shape.

The coupling between the second frame 300 and the nut bracket 64 may be achieved by fastening means such as a detachable bolt. Accordingly, the nut bracket 64 can be moved to the left and right according to the rotation of the ball screw shaft 61. The second frame 300 fastened to the nut bracket 64 moves in conjunction with the rotation of the ball screw shaft 61, The knurling 51 can be continuously formed.

In the ball screw member 60 according to the present invention, a chain coupling is provided in the motor bracket 62 and the end bracket 63 to facilitate selection and exchange of the ball screw shaft 61, Can be combined. Therefore, after the second frame 300 and the nut bracket 64 are separated from each other in the state of the ball screw member 60, the direction of the ball screw shaft 61 and the nut bracket 64 is changed by 180 degrees and the motor bracket 62 and the end bracket 63, the knurled direction can be easily changed.

Each of the pair of roulette holders 70 consists of a roulette 72 and a support 71 for rotatably supporting the roulette 72, as shown in Fig. The roulette 72 may be interchangeably coupled to the support table 71 and may be provided in the lateral and longitudinal directions or in an oblique sawtooth shape to form the knurl 51 on the steel plate 50. The roulette 72 may have a rhombus-shaped groove formed by obliquely intersecting the surface of the steel plate 50 obliquely in different directions, as well as the surface of the steel plate 50 may have a concavo-convex shape.

As shown in FIGS. 3 and 5, the first frame 200 is equipped with a pair of first cylinders 210 and second cylinders 220 at both ends of a horizontal guide bar. The pair of first cylinders 210 and the second cylinders 220 are provided to apply pressure to the pair of roulette 72 in the vertical direction (Y direction) of the main body toward the steel plate 50 And a power supply line PL to which a power required for operation of the pair of the first cylinder 210 and the second cylinder 220 is connected. 3 and 5, when the pair of first cylinders 210 and the second cylinders 220 are pressurized so that the roulette 72 abuts against the steel plate 50, The continuous knurling 51 is formed simultaneously at two places of the steel plate 50 (the front end portion of the steel plate and the middle portion of the steel plate) by moving the housing 200 in the width direction (X direction) of the main body 100 . By applying the pair of roulette 72 in this manner, the knurling operation on the steel plate 50 can be speeded up. In the above description, a pair of roulettes 72 is applied. However, the present invention is not limited thereto and three or more roulettes may be applied. However, when only one roulette 72 is used, the time for forming the knurling 51 is delayed in the steel plate 50, and when the size of the roulette 72 is increased, the force applied from the cylinder is not uniformly applied Uniform knurling is not formed on the surface of the steel plate 50.

3 and 7, the third frame 400 is provided integrally with the second frame 300 at a substantially central portion of each connecting bar of the pair of second frames 300. [

A second ball screw member 410 for moving the first frame 200 in the width direction (X direction) of the main body is mounted on the lower portion of the third frame 400 as shown in FIG. Like the ball screw member 60 shown in FIG. 6, the second ball screw member 410 includes a ball screw shaft 411 driven by a motor, a ball screw shaft 411 fixed to the third frame 400, A motor bracket 412 provided at one end of the ball screw shaft 411 and an end bracket 413 fixed to the third frame 400 and provided at the other end of the ball screw shaft 411 to support the ball screw shaft 411, And a nut bracket 414 coupled to the first frame 200 and screwed to the ball screw shaft 411. The ball screw shaft 411 is rotated by the rotational force from the motor to rotate the first frame 200 Is moved in the width direction (X direction) of the main body.

The first to third frames 200, 300, and 400 may be formed of, for example, a steel material.

Next, control of the machining apparatus for a steel plate for a steel pipe as shown in Fig. 3 will be described with reference to Figs. 8 and 9. Fig.

FIG. 8 is a block diagram for explaining a control process of a machining apparatus for a steel plate for a steel pipe according to the present invention, and FIG. 9 is a diagram for explaining a procedure for machining by a machining apparatus for a steel plate for a steel pipe according to the present invention.

The processing apparatus for a steel plate for a steel pipe according to the present invention includes a control unit for controlling the movement of the first frame 200 and the pair of second frames 200 and for controlling the pressures of the first and second cylinders 210 and 220 Member.

8, the control unit 500 includes a control unit 500 including a microprocessor, an input unit 510, and a memory unit 520 including a nonvolatile memory. The control unit 500 includes a first frame 200 And the pair of second frames 300 are moved back and forth in the main body 100 in the longitudinal direction (Z direction) of the main body 100, And controls the pair of second frames 300 to move in the longitudinal direction (Z direction) of the main body by a length corresponding to the width of the roulette after moving the first frame 200 in the X direction.

The input unit 510 is provided for inputting the type, size, and the like of the steel plate 50 to be input to the memory unit 520, and is composed of a normal keyboard or a touch panel. Information on the type of the steel plate 50 for the knurling process, information on the size of the steel plate, information on the second ball screw member 410 for moving the first frame 200, Information on the pressure application by the first cylinder 210 and the second cylinder 220, information on the pair of first ball screw members 60 for movement of the second frame 300, And the like are stored. Although the control unit 500 and the memory unit 520 are shown separately in FIG. 8, the present invention is not limited thereto. The memory unit 520 may be included in the control unit 500.

In the machining apparatus for a steel plate for a steel pipe according to the present invention, a steel plate (50) having a length and a width to be machined is first mounted on the main body (100). For example, the hinge 110 is opened as shown in Fig. 3 and the steel plate 50 is inserted into the insertion portion 120 provided in the main body 100. [ 5, the surface of the steel plate 50 slightly protrudes from the surface of the main body 100 by the elastic force of the elastic member 130, and the roulette (for example, 72 can be improved.

After the steel plate 50 is mounted on the main body, the control unit 500 controls the movement of the first portion (the front end portion of the steel plate) and the second portion (the middle portion of the steel plate) of the steel plate 50 And the first cylinder 210 and the second cylinder 220 pressurize the pair of roulette 72 in the vertical direction (Y direction) of the steel plate 50 So that the pair of roulette 72 and the first and second portions of the steel plate 50 are brought into close contact with each other.

In this state, the control unit 500 operates the second ball screw member 410 according to the moving speed information of the first frame 200 stored in the memory unit 520, as shown in FIG. 9 (a) The knurling 51 is formed on the first portion and the second portion of the steel plate 50 as well.

9 (a), the first frame 200 is moved in the width direction X of the main body by the control of the controller 500 while keeping the pair of roulette 72 in close contact with the first and second portions The width of the roulette 72 as shown in Fig. 9 (b) is increased by forming the knurling 72 in the first direction in the width direction (X direction) of the steel strip 50, Is nullified.

9 (b), when the knurling in the first direction in the width direction (X direction) of the steel plate 50 is completed, the control unit 500 controls the first cylinder 210 and the second cylinder The second frame 300 is moved in the first direction in the longitudinal direction (Z direction) of the steel plate 50 after the roulette 72 is separated from the steel plate 50 . That is, the control unit 500 operates the pair of ball screw members 60 according to the moving speed information of the second frame 200 stored in the memory unit 520 and the information of the roulette 72, The second frame 200 is moved in the longitudinal direction (Z direction) of the main body 100 by a distance corresponding to the second frame 200. [

After the second frame 200 is moved in the longitudinal direction (Z direction), the control unit 500 again controls the first cylinder 210 and the second cylinder 220 to move the pair of roulette 72 against the steel plate So that the pair of roulette 72 is brought into close contact with the steel plate 50 by controlling the pressure to be applied in the vertical direction (Y direction) Thereafter, the first frame 200 is moved in the width direction (X direction) opposite to the first direction (the lower direction in FIG. 9) in the width direction (X direction) described above with respect to the steel plate 50 9, the knurling operation is performed toward the upper side as shown in Fig. 9 (c).

After the knurling in the second direction in the width direction (X direction) of the steel plate 50 is completed, the pair of second frames 300 are moved to the first position in the longitudinal direction (Z direction) The knurl 51 is formed on the entire surface of the steel plate 50 as shown in Fig. 9 (d).

As described above, according to the present invention, since the spacing of the pair of roulettes 72 is provided at an interval of 1/2 of the length of the steel sheet to be processed, the knurling operation is performed at a speed twice as fast as that of one roulette- Can be executed.

The controller 500 dismantles the pressure applied to the first cylinder 210 and the second cylinder 220 so that the roulette 72 is separated from the steel plate 50 do. At this time, the second frame 200 is positioned on the hinge 110 side in the structure shown in FIG. Next, after the hinge 110 is opened and the steel plate 50 is separated from the main body 100, the steel plate 50 'is mounted on the main body 100 as described above for knurling the other steel plate 50' do.

Next, the control unit 500 controls the first cylinder 210 and the second cylinder 220 to apply pressure to the pair of roulette 72 in the vertical direction (Y direction) of the steel plate 50 ' The pair of roulette 72 and the steel plate 50 'are brought into close contact with each other at a position as shown in FIG. 9E, and the nulling operation is performed. That is, the controller 500 controls the pair of second frames 300 in the longitudinal direction (Z direction) of the steel plate 50 in the first direction (the direction toward the left in FIG. 9) Z direction) in the second direction (the direction toward the right in Fig. 9) and performs nulling operation. When the knurling operation for the second steel plate 50 'is completed, the third steel plate is operated in the same direction as the knurling operation for the first steel plate 50 as shown in FIG.

As described above, according to the present invention, the knurling operation can be performed on two steel plates in accordance with one reciprocating movement of the second frame 300, so that the movement energy of the second frame 300 can be reduced.

In the above-described embodiment, the structure in which the spacing of the pair of roulette holders is fixed has been described. However, the interval between the pair of roulette holders can be set to be variable.

10 is a perspective view of a machining apparatus for a steel plate for a steel pipe according to another embodiment of the present invention. In this alternative embodiment, the same reference numerals are assigned to the same structures as those shown in FIG. 3, and a description thereof will be omitted.

10, in the first frame 200, a pair of roulette holders 70 are formed so as to extend in the longitudinal direction (Z direction) of the main body, A third cylinder 230 for moving one roulette holder to the guide bar is provided. When the length of the steel plate to be mounted on the inserting portion 120 of the main body 100 is longer or shorter than the length of the steel plate stored in the memory portion 520, by operating the third cylinder 230, a pair of roulette holders 70 can be adjusted.

Such adjustment can be easily realized by inputting information on the steel plate through the input unit 510 and controlling the third cylinder 230 according to the input information by the control unit 500. [

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The knurling operation of the steel sheet can be realized at a high speed by using the machining apparatus for the steel sheet for steel pipe and the machining method thereof according to the present invention.

100:
200: 1st frame
300: second frame
400: third frame
500:

Claims (7)

A main body having a pair of first ball screw members mounted with steel plates to be machined,
A first frame which is movable in a width direction (X direction) of the main body on the main body and is equipped with a pair of roulette holders for forming knurling on the steel strip,
A pair of second frames respectively mounted on the pair of first ball screw members to move in the longitudinal direction (Z direction) of the main body on the main body,
And a third frame mounted between the pair of second frames and having a second ball screw member for moving the first frame in a width direction (X direction) of the main body,
The first frame is equipped with a third cylinder for moving one roulette holder so that the interval of the pair of roulette holders extends in the longitudinal direction (Z direction) of the main body,
And the interval of the pair of roulette holders is 1/2 of the length of the steel plate to be machined. The method of claim 1,
Wherein the main body is provided with an insertion portion formed such that the surface of the steel plate is positioned above the surface of the main body,
Wherein the insertion portion is provided with an elastic member for maintaining elasticity during the knurling operation of the steel plate. The method of claim 1,
And a first cylinder and a second cylinder for applying pressure to the pair of roulette in the vertical direction (Y direction) of the body toward the steel plate are mounted on the first frame. Device. delete 4. The method of claim 3,
Further comprising a control member for controlling the movement of the first frame and the pair of second frames and for controlling the pressures of the first and second cylinders,
Wherein the control member controls the first frame to reciprocate in the width direction (X direction) of the main body in the third frame, and the control member controls the second frame in the longitudinal direction of the main body (Z direction), and the control member is moved in the width direction (X direction) of the body of the first frame, and then the pair of second frames is moved in the longitudinal direction of the body by a length corresponding to the width of the roulette (Z direction) of the steel plate.
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KR1020170176809A 2017-12-21 2017-12-21 Machining apparatus of steel sheet for steel pipe and processing method thereof KR101868514B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10109233A (en) * 1996-10-03 1998-04-28 Shinko Techno Kk Tightening and loosening device for form bolt
KR20090055196A (en) * 2007-11-28 2009-06-02 주식회사 코마텍 Spindle adjust apparatus of machine tool for computerized numerical control twin spindle
KR20120014845A (en) * 2010-08-10 2012-02-20 주식회사 성우하이텍 Burr removal device for roll forming system
KR101366504B1 (en) 2009-07-08 2014-02-27 김현주 Surface treatment unit
KR101513996B1 (en) 2014-10-21 2015-04-21 건일스틸 주식회사 Steel Pipe Inner Surface Machining Apparatus and Processing Method
KR101719646B1 (en) * 2016-02-29 2017-03-24 오영한 Flat surface portable machining apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10109233A (en) * 1996-10-03 1998-04-28 Shinko Techno Kk Tightening and loosening device for form bolt
KR20090055196A (en) * 2007-11-28 2009-06-02 주식회사 코마텍 Spindle adjust apparatus of machine tool for computerized numerical control twin spindle
KR101366504B1 (en) 2009-07-08 2014-02-27 김현주 Surface treatment unit
KR20120014845A (en) * 2010-08-10 2012-02-20 주식회사 성우하이텍 Burr removal device for roll forming system
KR101513996B1 (en) 2014-10-21 2015-04-21 건일스틸 주식회사 Steel Pipe Inner Surface Machining Apparatus and Processing Method
KR101719646B1 (en) * 2016-02-29 2017-03-24 오영한 Flat surface portable machining apparatus

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