WO2011145773A1

WO2011145773A1 - Lug cutter

Info

Publication number: WO2011145773A1
Application number: PCT/KR2010/004301
Authority: WO
Inventors: 이정화; 진송학
Original assignee: Lee Jung Hwa; Jin Song Hag
Priority date: 2010-05-19
Filing date: 2010-07-02
Publication date: 2011-11-24
Also published as: KR101017210B1

Abstract

The present invention relates to a lug cutter. The lug cutter includes: a main frame on which a sliding rail is disposed in a lengthwise direction, the main frame being coupled to a rib of a lug and thus fixed to the lug; a bandsaw movably coupled to the sliding rail of the main frame to cut the lug; and a transfer unit enabling the bandsaw to be moved along the sliding rail. In the lug cutter according to the present invention, the lug may be removed to prevent paint or metal of a block structure from being damaged. In addition, since the lug cutter is fixed to the rib of the lug, the lug cutter may be stably installed on a cut position of the lug to uniformly cut a machined surface of the lug.

Description

Lug Cutting Device

The present invention relates to a lug cutting device. More particularly, the present invention relates to a lug cutting device capable of removing a lug installed in a ship building block so as not to damage the painting or metal structure of the block structure.

In general, the ship construction process is made through a mounting process in which a plurality of unit blocks are prepared in advance and then stacked together using a crane. Blocks are getting bigger due to the rapid development of ship construction methods. Therefore, when the block is manufactured, the painting process is performed in advance in the painting factory, and then the mounting process is performed.

In the mounting process, a block manufactured to lift a large block or move it to a desired position is provided with a lug in which a fastening hole is formed so as to connect a hook of a crane.

A plurality of lugs are welded at appropriate positions of the block, and heavy materials weighing up to 100 kg may be used to withstand the load of the block to be enlarged.

1 is a perspective view showing one form of a lug mounted on a block of a ship, and FIG. 2 is a front view illustrating flame cutting of a lug mounted on a block.

In general, as shown in Figure 1, the lug 1 has a circular fastening hole 6 is formed to be caught while the hook (not shown) of the crane is inserted into the lug body 5 disposed in the vertical direction. Reinforcing plates 7 for reinforcing the strength of the fastening holes 6 are installed at both sides of the lug body 5 in the edge area of the fastening hole 6, and on both sides of the lug body 5 with the blocks. A plurality of ribs 4 can be mounted to increase the tightening force.

As shown in FIG. 2, the lugs 1 mounted while the lug body 5 and the lower portions of the ribs 4 are welded to the surface of the block B must be removed from the block B again after the mounting process is completed. do.

In the removal operation of the lug 1, a method of cutting using the flame F is used so that the height h1 remains 15 to 30 mm from the lower end of the lug 1 welded to the block B.

After most of the lug 1 is cut, a finishing process of removing the lower end 5a of the lug 1 remaining in the block B through the grind is performed, and the cut lug 1 is again blocked by a regeneration operation. It is attached to (B) and used.

However, in the lug removal operation through the cutting method of flame (F), since the high temperature of about 5,000 K to 20,000 K is applied to the cut portion of the lug 1, the painted portion of the block B is damaged or the block B and the lug The problem that the metal structure of (1) changes is caused.

In addition, since the person directly removes the lower end portion 5a of the lug 1 remaining in the block B after cutting by using a grinder, the surface is unevenly cut, which requires post-processing work and takes a lot of time. have.

In addition, in order to reuse the cut lug (1) it is necessary to cut the non-uniform cut surface again, so that the height (h2) of the lug (1) remaining after cutting the flame (F) is shorter and the regeneration efficiency is lowered There is.

In order to solve this problem, researches are being conducted on the cutting method of the lug cutting device instead of the flame cutting method, but in order to cut a heavy object lug, it is necessary to have a cutting edge having a strong cutting force. There is a problem that it becomes large and the structure is complicated.

Therefore, the cutting method technology, which is practically used for the actual lug removing work site, is hard to find and still relies on the flame cutting method.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a lug cutting apparatus capable of removing a lug through a cutting method so that the coating or metal structure of the block structure is not damaged.

In addition, another object of the present invention is to provide a lug cutting device that can be stably installed at the cutting position of the lug to uniformly cut the cut surface of the lug to increase the lug regeneration efficiency.

The present invention is a sliding rail is formed along the longitudinal direction, the main frame is fixed to the lug while being coupled to the rib of the lug, the band saw assembly and the band saw assembly that is movably coupled to the sliding rail of the main frame to cut the lug It provides a lug cutting device comprising a; transfer unit for moving the assembly along the sliding rail.

The mainframe may further include a horizontal adjustment unit for adjusting the horizontal surface with the lug attached block surface.

The horizontal adjustment unit may include a pair of adjustment plates respectively supporting both ends of the main frame, and an adjustment screw one end is movably inserted into the adjustment plate and the other end is in contact with the block surface.

The main frame may include a base on which the sliding rail is formed and a fastening part provided on the base and fastened to the rib of the lug.

The fastening part includes a fastening plate provided in the center region of the base, a clamp surrounding the ribs from below, a bracket bolted to the clamp, and a fastening member fixing the bracket to the fastening plate and applying a tensile force to the clamp. It may include.

The fastening plate is formed with a nut hole, the fixing member may include a bolt that is inserted into the nut hole and the other end is coupled to the bracket, the nut is inserted into the nut hole of the fastening plate and fastened to the bolt. have.

The band saw assembly may include a shadle movably mounted to the main frame, a band saw coupled to the shade in a closed curve shape, and a motor for rotating the band saw to rotate the band saw.

The band saw assembly may further include a band saw tension adjusting unit for adjusting the tension of the band saw.

The transfer unit is mounted to the shadle and the guide block in contact with the sliding rail; It may include a ball screw and a drive motor for driving the ball screw installed in the shade and the main frame to move the shade in parallel with the sliding rail.

On the other hand, the present invention is coupled to the main frame is formed with a sliding rail along the longitudinal direction, the rib of the lug and the fastening portion for fixing the lug to the main frame, and is movably coupled to the sliding rail of the main frame Band saw assembly for cutting; And it provides a lug cutting device comprising a transfer unit for moving the band saw assembly along the sliding rail.

According to the present invention, the lug cutting device has the following effects.

First, the lug cutting device of the present invention can maintain the generated temperature at 250 degrees or less when cutting the lug can remove the lug so as not to damage the coating or metal structure of the block structure.

Second, since the lug cutting device is fixed to the rib of the lug can be installed stably at the cutting position of the lug can be cut evenly cut surface of the lug.

Third, since the lug can be precisely cut while moving the band saw assembly, the post-processing work is easy on the cut block, and the regeneration efficiency of the cut lug can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows one form of the lug attached to the block of a ship.

2 is a front view illustrating flame cutting of a lug mounted to a block;

Figure 3 is a perspective view of one embodiment of a lug cutting device of the present invention.

4 is a state in which the clamp of the fastening part of FIG. 3 is mounted to the rib of the lug.

5 is a state in which the bracket and the fixing member is mounted to the clamp of FIG.

6 is a plan view of FIG.

7 is a front view of FIG. 3.

8 is a perspective view of the band saw assembly of FIG.

9 is a perspective view of main parts of the transfer unit of FIG. 3;

FIG. 10 is a plan view of FIG. 3 showing the operational state of the band saw assembly after cutting the lug. FIG.

Lug cutting device according to the present invention is a sliding rail is formed along the longitudinal direction, the main frame is fixed to the lug while being coupled to the rib of the lug, and the band saw assembly which is movably coupled to the sliding rail of the main frame and cutting the lug; It includes a transfer unit for moving the band saw assembly along the sliding rail.

The present invention is a sliding rail is formed along the longitudinal direction, the main frame is fixed to the lug while being coupled to the fastening hole of the lug, the transfer unit and the removable unit is movably coupled to the sliding rail of the main frame and detachable to the transfer unit Provided is a lug cutting device comprising a band saw assembly coupled to cut the lug.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Figure 3 is a perspective view of one embodiment of a lug cutting device of the present invention, Figure 4 is a state in which the clamp of the fastening portion of Figure 3 is mounted on the rib of the lug, Figure 5 is a clamp and a fixing member in the clamp of Figure 4 FIG. 6 is a top view of FIG. 3, FIG. 7 is a front view of FIG. 3, FIG. 8 is a perspective view of the band saw assembly of FIG. 3, FIG. 9 is a perspective view of a main portion of the transfer unit of FIG. 3, and FIG. FIG. 10 is a plan view of FIG. 3 and shows the operational state of the band saw assembly after cutting the lug.

Lug cutting device 10 according to an embodiment of the present invention is formed with a plurality of sliding rails 111 along the longitudinal direction and is coupled to the rib 4 of the lug (1) is fixed to the lug (1) Frame 100, the band saw assembly 300 is movably coupled to the sliding rail 111 of the main frame 100 and cut the lug 1, and the band saw assembly 300 is the sliding rail ( It comprises a transfer unit 400 to move along the 111.

The mainframe 100 is equipped with the main components of the lug cutting device 10 of the present invention is mounted detachably fixed to the lug (1) welded to the block (B) of the vessel. To this end, the lug cutting device 10 of the present invention fixes the main frame 100 to the upper part of the block B to which the lug 1 is welded using the ribs 4 provided in the lug 1. .

Therefore, the band saw assembly 300 mounted on the lug 1 and movably mounted to the main frame 100 placed on the upper portion of the block B while the main frame 100 is fixed to the lug 1 crosses the lug 1 while the lug ( The lower end of 1) can be cut out from the block B. FIG.

That is, the main frame 100 may be mounted on the lug 1 when the lug 1 is cut and separated from the lug 1 after the cutting operation is completed. As described above, the present invention is a technology for mounting a cutting tool directly on the lug 1 to be cut, and it should be noted that the space utilization and the precision of the cutting work can be increased during the cutting work.

The mainframe 100 is preferably made of aluminum to lighten the load, which provides an effect that allows the operator to easily attach and detach the mainframe 100 to the lug (1).

3, 6, and 7, the main frame 100 is more specifically provided with a base 110 on which a sliding rail 111 is formed, and a rib of the lug 1 provided on the base 110. 4) the main frame 100 is stably fixed to the lug (1) and the block (B) by adjusting the level of the fastening portion 200 and the surface of the block (B) to which the lug 1 is attached It is provided with a horizontal adjusting unit 130 to be.

The base 110 may have a rectangular cross section and may have a hollow block shape that is elongated along the longitudinal direction of the lug 1. Two sliding rails 111 are provided on an upper surface of the base 110, and two sliding rails 111 are formed on a side surface of the base 110 along a length direction.

The sliding rail 111 constitutes a part of the linear motion (LM) guide as in this embodiment, and may be provided in the form of a guide rail coupled to the guide block 410 of the transfer unit 400 to be described later, and having a groove formed therein. It may be modified in form.

LM guides are known to ensure stable and precise feed. Therefore, the lug cutting device 10 of the present invention employing the LM guide can reduce the influence of the sliding phenomenon or vibration while cutting the lug 1 while feeding along the longitudinal direction of the lug (1).

Of course, the sliding rails may be configured such that at least one of the sliding rails is not provided in plural, and the shape of the above-described base may be modified according to the number and shape of the sliding rails.

The fastening part 200 provided in the vertical direction in the center of the base 110 is in direct contact with the lug 1 so that the main frame 100 can be fixed to the rib 4 of the lug 1.

More specifically, the fastening part 200 includes a fastening plate 210 provided in a central area of the base 110, a plurality of clamps 220 wrapping the ribs 4 of the lugs 1 from the bottom, It may include a bracket 230 which is bolted to the clamp 220, and a fixing member 240 for fixing the bracket 230 to the fastening plate 210 and applying a tensile force to the clamp 220. .

As shown in FIGS. 3 and 6, the fastening plate 210 is provided as a plate in which two nut holes (not shown) are formed so that each bolt 241 of the fixing member 240 is fitted into the fastening plate 210 of the base 110. It can be manufactured integrally with the base 100 in the hollow area.

The clamp 220 is installed in the joining region of the lug body 5 and the rib 4 as shown in FIGS. 4 and 5. That is, the clamp 220 is formed to have a groove formed to the thickness of the rib 4 and to surround both surfaces of the rib 4 from the bottom thereof, and is mounted to surround the lower region of the rib 4. The other side of the clamp 220 may be in contact with the lug body 5 for stable support with the lug (1).

Of course, the clamp 220 is not limited to the above-described form can be variously modified, such as hook shape.

As such, the clamp 220 is provided in the lug 1 as many as the number of the ribs 4 in the form of wrapping the lower region of the ribs (4). In this embodiment, since four ribs 4 are mounted on one surface and the other surface of the lug body 5, four clamps 220 are mounted on the lug 1.

When the clamp 220 is mounted on the rib 4, the bracket 230 connects the clamps 220 installed on the ribs 4 formed to face one surface and the other surface of the lug body 5, respectively. 220 is assembled.

The bracket 230 may be assembled in a bolted manner with a pair of clamps 220 while having a Korean letter 'c' shape as shown in FIG. 5. Therefore, when the bracket 230 assembled to the clamp 220 is lifted up, the ribs 4 are subjected to a pulling force pulled up by the clamp 220.

The bracket 230 may be applied to the clamp 220 while being fixed to the fastening plate 210 by the fixing member 240. To this end, the fixing member 240 is inserted into the nut hole of one end is inserted into the nut hole of the fastening plate 210 and the other end is coupled to the bracket 230 and the nut hole of the fastening plate 210. And a nut 243 fastened to the bolt 241.

Therefore, when the user inserts and rotates the bolt 241 coupled to the bracket 230 to the nut hole of the fastening plate 210 appropriately and fixes the position with the nut 242, the clamp connected to the bracket 230. 220 exerts a tensile force on the rib 4.

As such, the mainframe 100 may be stably fixed at the position while being coupled to the rib 4 of the lug 1 through the fastening part 200. However, since the main frame 100 is fixed to the central region through the lug 1, it is necessary to consider a more stable and balanced fixed state.

To this end, the horizontal adjustment unit 130 added to the configuration of the main frame 100 has two pairs of adjustment plates 131 for supporting both ends of the base 110 (four points in total) and one end thereof. It may include an adjustment screw 135 is movably inserted into the adjustment plate 131 and the other end is in contact with the surface of the block (B).

The adjusting plate 131 may be provided to extend downwards from both ends of the base 110 at positions centering on the fastening part 200. The adjustment plate 131 is threaded so that the adjustment screw 135 is movably coupled. Thus, the adjustment screw 135 can be raised and lowered on the inside of the control plate 131 and the surface of the block (B) by rotation.

The horizontal adjuster 130 serves as a support point for fixing the lug 1 together with the fastening part 200, and the main frame 100 is stably supported in the block (B).

Through the horizontal adjustment unit 130, the operator can fit the horizontal height of the four corners of the base 110 in the process of mounting the main frame 100 to the lug (1).

Therefore, the main frame 100 mounted to the lug 1 by the fastening part 200 may be more stably fixed. In addition, the band saw assembly 300 mounted on the main frame 100 and moving along the sliding rails 111 may stably move and cut the lug 1 with a cutting surface uniformly.

More specifically, as shown in FIG. 8, the band saw assembly 300 is coupled to the shadle 310 in a closed curve shape with a shadle 310 movably mounted to the main frame 100 and the lugs. It comprises a band saw 320 for cutting (1), a motor 330 for rotationally driving the band saw 320, and a band saw tension adjusting unit 350 for adjusting the tension of the band saw 320.

The saddle 310 may be formed to surround the upper side and both sides of the base 110 of the main frame 100. The band saw 320 is mounted at one side of the shade 300, and for this purpose, the plurality of

pulleys

341 and 342 and the

rollers

343 and 344 are rotatably supported on the shade 310. ) Is mounted.

One of the pulleys 342 is connected to the shaft of the motor 330 receives the driving force and transmits to the band saw 320. Accordingly, the band saw 320 rotates at one side of the shadle 310 while drawing a closed curve in a form surrounding the

pulleys

341 and 342 and the

rollers

343 and 344, and uses the rotation to the band saw 320. Can cut the lug 1.

The band saw 320 is made of special steel or the like, the thickness is 1 to 2mm (preferably 1.6mm), the width is to be carried out to 30 to 50mm (preferably 41mm) so as to smoothly cut the lug (1). Can be.

In addition, a plurality of hard metal cemented carbide tips may be formed on the surface of the band saw 320 in a form in which about 1000 hard facings are coated. As such, when the cemented carbide is coated on the surface of the band saw 320, hardness and wear resistance are improved, thereby showing a high performance in cutting the lug 1 of metal material and extending the life.

The band saw 320 may be provided with a safety cover, the safety cover may be made of a form surrounding the outside of the band saw 320 to prevent dust or sparks generated during cutting to scatter to the worker, lugs The site adjacent to (1) can be configured to be exposed.

A servo motor that rotates at 3,000 RPM may be used as the motor 330 for rotating the band saw 320, and a reducer (not shown) may be used for the motor 330. The speed reducer receives a high speed rotational force from the servo motor and decelerates at a speed necessary for cutting.

The reducer may rotate the band saw 320 by generating a torque of 200 RPM and 12.5 Kgf.m, for example, with a reduction ratio i of 1 / 12.5 for efficient cutting of the lug 1.

The tension control unit 350 may be formed of a tension adjusting roller provided in the inner region of the band saw 320 shown in FIG. 8, and an adjusting means capable of adjusting the horizontal distance of the tension adjusting roller. Therefore, when the position of the tension adjusting roller is changed through the adjusting means, the tension of the band saw 320 is adjusted so that the cutting strength of the band saw 320 can be adjusted.

On the other hand, the transfer unit 400 includes a guide block 410 which is mounted to the above-mentioned shadle 310 of the band saw assembly 300 and in contact with the sliding rail 111 of the main frame 100.

The guide block 410 has a number corresponding to the number of the sliding rails 111 and is in contact with the sliding rails 111 while being mounted on the upper and side regions of the shadle 310.

The transfer unit 400 is a ball screw 420 installed on the shade and 310 and the main frame 100 to move the shade 310 in a direction parallel to the sliding rail 310 and the ball It further includes a drive motor 430 for driving the screw 420.

9 illustrates a main portion of the transfer unit 400 in which two screws 423 constituting the ball screw 420 are transmitted with a rotation driving force by the driving motor 430. The driving motor 430 rotates the screw 423 by a plurality of pulleys and a belt surrounding the plurality of pulleys, and thus the ball bearing 421 coupled to the screw 423 may move.

In this case, the screw 420 is installed on the main frame 100, and the ball bearing 420 is installed on the shade 310, so that the shade 310 is a sliding rail 111 of the main frame 100. The lug 1 can be cut while moving automatically.

When the lug cutting device 10 of the present invention having such a configuration is placed on the upper portion of the block B while being fixed to the lug 1, the band saw assembly 300 in the X-axis direction as shown in FIG. The lower end of the lug 1 is cut while moving.

When the lug 1 is cut, the lug cutting device 10 is separated from the lug 1, so that it is easy to dismantle it from the block B of the ship.

As described above, the lug cutting device 10 of the present invention can precisely cut the lug while moving along the longitudinal direction of the lug 1 while being fixed to the rib 4 of the lug 1, and thus post-processing the cut block. Not only is this simple, it is possible to increase the regeneration efficiency of the cut lugs.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

A main frame formed along the longitudinal direction of the sliding rail and fixed to the lug while being coupled to the rib of the lug;

A band saw assembly movably coupled to the sliding rail of the main frame and cutting the lugs; And

Lug cutting device comprising a; transfer unit for moving the band saw assembly along the sliding rail.
The method of claim 1,

The mainframe is a lug cutting device further comprises a horizontal adjusting portion for adjusting the horizontal surface with the lug attached block surface.
The method of claim 2,

The horizontal adjustment part includes a pair of adjustment plates for supporting both ends of the main frame, and an adjustment screw having one end movably inserted into the adjustment plate and the other end contacting the block surface. Cutting device.
The method according to any one of claims 1 to 3,

The mainframe

A base having the sliding rail formed thereon;

Lug cutting device characterized in that it comprises a fastening portion provided in the base and fastened to the rib of the lug.
The method of claim 4, wherein

The fastening portion

A fastening plate provided in a central area of the base;

A clamp surrounding the rib at the bottom;

A bracket bolted to the clamp; And

Lug cutting device comprising a fixing member for fixing the bracket to the fastening plate to apply a tensile force to the clamp.
The method of claim 5,

The fastening plate is a nut hole is formed,

The fixing member is a lug cutting device characterized in that it comprises a bolt that is inserted into the nut hole and the other end is coupled to the bracket, and the nut is inserted into the nut hole of the fastening plate and fastened to the bolt.
The method according to any one of claims 1 to 3,

The band saw assembly is

A shadle movably mounted to the mainframe;

A band saw coupled to the shadle in a closed curve shape and cutting the lugs; And

Lug cutting device comprising a; a motor for rotating the band saw.
The method of claim 7, wherein

The band saw assembly further comprises a band saw tension adjusting unit for adjusting the tension of the band saw.
The method of claim 7, wherein

The transfer unit

A guide block mounted to the shadle and in contact with the sliding rail;

A ball screw mounted to the shade and the main frame to move the shade in a direction parallel to the sliding rail; And

Lug cutting device comprising a drive motor for driving the ball screw.
A main frame in which a sliding rail is formed along the longitudinal direction;

A fastening part fastened to the rib of the lug and fixing the lug to the main frame;

A band saw assembly movably coupled to the sliding rail of the main frame and cutting the lugs; And

Lug cutting device comprising a; transfer unit for moving the band saw assembly along the sliding rail.