KR20190143279A - Lug cutting and miling device - Google Patents

Abstract

The present invention relates to a lug cutting and milling apparatus comprising: a main body frame that can be attached to and detached from a hull in which a lug is installed; a cutting means provided on one side of the main body frame to cut the lug using a wire saw; and a lifting means provided on each of corners of the main body frame to lift the main body frame. According to the present invention, the lug cutting and milling apparatus is further provided with a milling means mounted on the center of the main body frame for cutting the cut surface of the lug cut by the cutting means.

Description

Lug cutting and miling device

The present invention relates to a lug cutting and milling apparatus, and more particularly, to a lug cutting and milling apparatus capable of cutting a lug attached to a block of a ship and simultaneously cutting a cut surface.

In general, in the case of manufacturing a large structure, individually block structures are fabricated by assembling each other. For example, in the case of a ship, the blocked structure is assembled in a dock to build the ship.

In the case of block structures of such ships, since each block is also large in size, a plurality of lugs are welded and attached to individual block structures for transport, and then they are transported by hanging on the lugs using a transfer machine such as a large crane. .

Lugs are cut, removed and reused after the structure reaches its destination.

Conventionally, a gas cutting or plasma cutting method of generating a high heat of about 5,000 ~ 20,000K to melt and cut the weld of the lug to cut the lug was used.

However, such a gas cutting or plasma cutting method has a problem in that the efficiency of the work is inferior because the operator is done manually.

In addition, since the amount of lugs melted by heat during the cutting of the lug by gas cutting method is not only limited to 2 or 3 times of reuse of the cut lugs, but also cuts the upper part of 4 to 5 cm to prevent deterioration of the coating. After that, the operator has to do the milling and grinding work again.

In addition, the cutting method using gas is not only harmful components generated by the generation of toxic gas and dust, flame, etc. due to heating, but also became a factor of environmental pollution.

In order to solve this problem, a device for cutting lugs using a wire saw capable of environmentally friendly work such as noise-free, dust-free and dry use has been recently known.

That is, the lug is cut by fixing the wire saw to the lug attached to the structure and then rotating and pulling the wire saw.

However, even with this new cutting method, the remaining part after cutting the lug had to be cut to the same height as the bottom of the block using a separate machine tool such as a milling machine.

As such, the duplication of work must be continued, which takes longer, requires more workers, and increases costs.

-Republic of Korea Patent Registration 10-1812236 (2017.12.19) "Lug cutting device using a wire saw" -Republic of Korea Patent Registration 10-1519795 (2015.5.6) "Ship Lug Cutting Device" -Republic of Korea Utility Model Registration 20-0342910 (2004.2.11) "Lug cutting and cutting device"

Accordingly, the present invention is to solve the above problems, an object of the present invention is a lug cutting and milling device that can be directly milled without moving after cutting the lug by using a wire saw and milling means integrally wire saw To provide.

Another object of the present invention is to provide a lug cutting and milling apparatus capable of performing cutting while controlling the cutting angle that the wire saw makes with the lug.

Lug cutting and milling apparatus according to the present invention for achieving the above object, and a main body frame that can be detachable to the hull is installed, and cutting means for cutting the lug using a wire saw provided on one side of the main body frame; In the lug cutting device comprising a lifting means for lifting the main body frame, respectively provided at the corner of the main body frame, Milling for cutting the cut surface of the lug mounted in the center of the main body frame cut by the cutting means Means are further provided.

In this case, the milling means, the X-axis rail provided along the longitudinal direction on both upper surfaces of the main body frame, the Y-axis rail seated on the X-axis rail and transportable along the X-axis rail, and the Y-axis A milling body seated on a rail and transportable along the Y-axis rail, a milling motor mounted to the milling body, a spindle axially coupled to the milling motor shaft, and a milling cutter coupled to the spindle for cutting lugs It can be made, including.

The milling body may further include a Z-axis rail so that the milling motor, the spindle, and the milling cutter can be transferred in the vertical direction.

The cutting means may include a main cutting motor installed at one upper side of the main body frame, a main pulley axially coupled to the main cutting motor to rotate under the main frame, and a length direction on both lower surfaces of the main body frame. Actuators provided along, and may be made to include one or more auxiliary pulleys coupled to both actuators and movable in the longitudinal direction, and a wire saw wound in a closed loop to the main pulley and the auxiliary pulleys.

Here, a tension pulley for maintaining the tension of the wire saw may be further provided on the other lower surface of the main body frame.

Meanwhile, the elevating means may include a magnet member provided at each corner of the body frame, an elevating cylinder vertically installed adjacent to the magnet member, and a moving wheel coupled to the rod of the elevating cylinder. .

According to the present invention having the configuration described above, because it is possible to cut the lug cutting surface in place without having to cut the lug and use a separate milling equipment, the work time is very shortened and the cost is greatly reduced and productivity is improved.

In addition, since the cutting angle of the wire saw can be controlled, the lug is easily cut and the life of the wire saw is improved.

In addition, since the cutting method using a wire saw, the temperature of the hull surface is about 100 ℃, there is no damage to the bottom coating, cutting noise or less than 80db, in compliance with the safety regulations.

1 is a perspective view showing the appearance of the lug cutting and milling apparatus according to an embodiment of the present invention
2 is a perspective view showing a lower surface of the present invention shown in FIG.
Figure 3a is an operating state of the cutting means of the present invention
Figure 3b is an operating state of the cutting means of the present invention
Figure 3c is an operating state of the cutting means of the present invention

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. In the following description of the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

The present invention relates to a lug cutting and milling device that can cut the lug attached to the block structure for the block transport of the vessel, and at the same time finish the cutting surface by milling, the main body frame 100, cutting means 200 ), Lifting means 300, it may be configured to include a milling means (400).

1 is a perspective view showing the appearance of a lug cutting and milling apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing a lower surface of the present invention shown in FIG.

First, the body frame 100 will be described.

The body frame 100 is a structure in which the cutting means 200, the lifting means 300, the milling means 400 is installed, as shown in the beam member supporting member 110 in the longitudinal direction in both directions horizontal Is provided as, consisting of a connecting member 120 for connecting both support members 110 between the support member 110 can achieve a shape such as 'H'.

The body frame 100 may be made of a metal material having excellent rigidity and strength.

The main body frame 100 has a magnet member 310 is coupled to both ends of the support member 110 so as to be detachable to the surface of the hull is installed.

Next, the cutting means 200 for cutting the lug will be described.

The cutting means 200 is provided on one side of the body frame 100, specifically on the connection member 120 to cut the lug located directly below.

The cutting means 200 may be configured to include a main cutting motor 210, a main pulley 220, an actuator 230, an auxiliary pulley 240, and a wire saw 250.

The main cutting motor 210 is mounted on the upper surface of the connecting member 120 of the main body frame 100 and provided with a motor shaft facing downward to drive the main pulley 220.

The main cutting motor 210 may be used three-phase 440V or three-phase 220V, the number of rotations may vary depending on the diameter of the main pulley 220 or the motor reduction ratio, it can maintain a constant rotational speed than a general electric motor In addition, it is preferable to use a servo motor which can be miniaturized and controlled.

And 7.5HP or more is suitable for smooth cutting.

The main pulley 220 is rotatably coupled to the motor shaft of the main cutting motor 210 while being positioned on the lower surface of the connecting member 120 of the main body frame 100.

The main pulley 220 is made of a metal material, it is preferable that the groove portion in which the wire saw 250 is wound is coated with a rubber resistant to heat, so that the torque loss is minimized. In this case, the rubber may be manufactured in a separate type so that it can be easily replaced when worn.

The size of the main pulley 220 may be determined in consideration of the capacity of the main cutting motor 210.

The actuators 230 are provided on the lower surfaces of both support members 110 of the main body frame 100 so that the auxiliary pulley 240 reciprocates along the longitudinal direction of the support member 110.

In this case, the actuator 230 may be a ball screw structure, but preferably may be an air cylinder or a hydraulic cylinder. Because, the ball screw method has a disadvantage in that the position control of the auxiliary pulley 240 is easy but durability is weak. On the other hand, the cylinder method is not easy to control the position, but can be cut much smoother since the lug can be cut while absorbing the impact from the cylinder to some extent.

A plurality of auxiliary pulleys 240 are provided on the lower surface of the main body frame 100, each coupled to the actuator 230 is movable.

Specifically, four auxiliary pulleys 240 may be provided.

First, the first auxiliary pulley 241 is installed adjacent to one side of the main pulley 220, may be rotatably installed on the lower surface of the connecting member 120, the second auxiliary pulley 242 and The third auxiliary pulley 243 is coupled to one of the actuators 230 in a line along the length direction and reciprocated, and the fourth auxiliary pulley 244 is coupled to the other actuator 230 and reciprocated.

Since the auxiliary pulley 240 is reciprocated, the cutting angle of the lugs of the wire saw 250 wound around the main pulley 220 and the auxiliary pulley 240 can be adjusted.

A wire saw 250 is wound around the main pulley 220 and the auxiliary pulley 240.

That is, the wire saw 250 passes through the main pulley 220, the first auxiliary pulley 241, the second auxiliary pulley 242, the fourth auxiliary pulley 244, and the third auxiliary pulley 243. Return to the main pulley 220 to form a closed loop (closed loop).

Therefore, the wire saw 250 wound around the third auxiliary pulley 243 and the fourth auxiliary pulley 244 by the rotation driving of the main pulley 220 is actually in contact with the lug to perform the cutting operation.

The wire wound around the third auxiliary pulley 243 and the fourth auxiliary pulley 244 according to the moving distance of the third auxiliary pulley 243 and the fourth auxiliary pulley 244 moved by the actuator 230. As the cutting angle of the saw 250 changes, the lugs can be cut evenly from side to side.

Preferably, the tension pulley 260 may be further provided on the other lower surface of the support member of the main body frame 100.

That is, the tension pulley 260 is provided adjacent to the outside of the fourth auxiliary pulley 244 and the wire saw 250 is wound around the wire saw 250 is loosened while cutting the lug so that the constant tension ( tension is applied.

To this end, the tension pulley 260 is provided with a separate tension cylinder (not shown) to control the tension applied to the wire saw 250 by pulling the tension pulley 260.

Next, the lifting means 300 will be described.

The elevating means 300 is to elevate the entire body frame 100 up and down, it may be configured to include a magnet member 310, the lifting cylinder 320 and the moving wheel 330.

As described above, the magnet member 310 is attached to each of four corners of the main body frame 100, that is, both ends of both of the support members 110.

To this end, brackets 340 may be coupled to both ends of the support member 110, and the magnet member 310 may be attached to a lower surface of the bracket 340. The horizontal bolts penetrate the brackets 340. 350 is fastened and the magnet member 310 is coupled to the horizontal bolt 350 to adjust the height of the magnet member 310 to adjust the horizontal height of the body frame 100.

Because the surface of the ship, which is a work site that is in progress during the lug cutting operation is uneven due to the unevenness or the bending of the iron plate to adjust the horizontal height of the main body frame 100 by adjusting the horizontal bolt (350).

The magnet member 310 should be completely fixed to the hull to prevent the body frame 100 from moving by the repulsive force due to the load when cutting the lug. Therefore, it is good to have a capacity of 250Kg or more.

Of course, the magnet member 310 is a natural electromagnet to control the magnetic force.

And the lifting cylinder 320 is installed in each bracket 340. The lifting cylinder 320 is installed vertically so that the rod is downward, it may be a hydraulic cylinder.

In addition, the moving wheel 330 is coupled to the rod end of the lifting cylinder 320.

The moving wheel 330 is for moving the present invention when the lug cutting operation is not performed, and may be made of a material having sufficient rigidity and strength to support the whole of the present invention.

Therefore, when the rod of the elevating cylinder 320 is advanced, the main body frame 100 ascends as a whole, thereby allowing the magnet member 310 to be spaced apart from the hull surface.

If the cutting operation position is reached, when the rod of the lifting cylinder 320 moves backward, the main body frame 100 descends, and thus the magnet member 310 is seated on the hull surface and supplies the magnetic force to the main body frame. 100 is firmly fixed.

Next, the milling means 400 will be described.

The milling means 400 is to cut the cut surface of the protruding lug cut by the cutting means 200 to have the same surface as the surrounding hull surface, X-axis rail 410, Y-axis rail 420 ), A milling body 440, a spindle 460, a milling cutter 470, and may be further provided with a Z-axis rail 430.

The X-axis rails 410 are respectively installed along the longitudinal direction on the upper surface of the support member 110 on both sides.

In addition, both ends of the Y-axis rail 420 may be seated on the X-axis rail 410 to be transported along the X-axis rail 410. That is, the Y-axis rail 420 is disposed perpendicular to the X-axis rail 410.

In addition, the milling body 440 is seated on the Y-axis rail 420 to allow the reciprocating transfer.

In addition, the milling motor 450 is installed vertically on one side of the milling body 440, the motor shaft of the milling motor 450 is installed downward.

The spindle 460 is axially coupled to the motor shaft of the milling motor 450, and the milling cutter 470, which is a cutting tool, is coupled to the spindle 460. The milling cutter 470 may be in close contact with or spaced apart from the cut surface of the lug according to the height of the main frame 100.

Therefore, the milling cutter 470 is rotated by the driving of the milling motor 450 to cut the cut surface of the lug.

Here, a separate Y-axis feed motor (not shown) and Y-axis feed screw (not shown) so that the milling body 440 moves along the Y-axis rail 420 to transfer the milling cutter 470 to a desired position. Can be used.

Similarly, an X-axis feed motor (not shown) and an X-axis feed screw (not shown) may be used to move the Y-axis rail 420 along the X-axis rail 410.

In addition, the milling body 440 is provided with a Z axis rail 430 vertically, and the milling motor 450, the spindle 460, and the milling cutter 470 are seated on the Z axis rail 430. It can be made to go up and down structure. Of course, a Z-axis feed motor (not shown) and a Z-axis feed screw (not shown) may be used to move the milling cutter 470 along the Z-axis rail 430.

Hereinafter, the operation of the present invention will be described with reference to FIGS. 3A, 3B, and 3C. Figure 3a, 3b, 3c shows an operating state diagram of the cutting means of the present invention.

First, the present invention is moved to the position where the lug to be cut is located. To this end, when the lifting cylinder 320 of the elevating means 300 is operated, the main frame 100 is raised by reaction force while the movable wheel 330 is seated on the hull, and the magnet member 310 is also removed from the hull. Falls. Then, by pushing the main body frame 100 by the cloud of the moving wheel 330, and adjusts the position so that the lug is in the lower center of the main body frame 100 when the required position arrives.

Then, the elevating cylinder 320 is operated again so that the main body frame 100 descends so that the magnet member 310 is in close contact with the surface of the hull, and the current is supplied to the magnet member 310 to have magnetic force. As a result, the body frame 100 firmly fixes the hull.

Next, the cutting means 200 is operated to cut the lug.

That is, the wire saw 250 is operated by driving the main cutting motor 210 to rotate the main pulley 220. The wire saw 250 alternately cuts the center, left and right sides of the lug while moving the second, third and fourth auxiliary pulleys 240 by driving the actuator 230. For reference, the lug has a shape provided with a body (L) and both wings (W) as shown.

Specifically, as shown in FIG. 3A, the second and fourth auxiliary pulleys 240 and the third auxiliary pulley 243 are controlled to be positioned side by side at the start of cutting so that the wire saw 250 contacts the center of the lug. Cut the lug body (L) in one state.

As shown in FIG. 3B, the third auxiliary pulley 243 is controlled to be more advanced than the second and fourth auxiliary pulleys 240 so that the wire saw 250 is disposed to be inclined downward downward. Cut the left wing (W).

In addition, as shown in FIG. 3C, the second and fourth auxiliary pulleys 240 are controlled to be more advanced than the third auxiliary pulleys 243 so that the wire saw 250 is inclined leftward downward. Cut the right wing (W) of the lug.

That is, by controlling the position of the auxiliary pulleys 240 by appropriately driving the actuator 230, the left and right sides of the lug can be cut alternately, thereby effectively cutting the entire lug.

Next, the milling means 400 is operated to cut the lug cut surface.

The milling body 440 is properly moved along the X-axis rail 410 and the Y-axis rail 420 so that the milling cutter 470 is positioned above the lug cut surface, and then the Z-axis rail 430. The milling cutter 470 is lowered to contact the cut surface of the lug.

And while cutting the lug cutting surface while driving the milling motor 450 to rotate the milling cutter 470, the milling body 440 horizontally along the X-axis rail 410 and Y-axis rail 420 By moving, the entire lug cut surface can be cut uniformly.

Although the exemplary embodiments of the present invention have been described above with reference to the drawings, those skilled in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

100: main frame
110: support member 120: connection member
200: cutting means
210: main cutting motor 220: main pulley
230: actuator 240: auxiliary pulley
241: first auxiliary pulley 242: second auxiliary pulley
243: third auxiliary pulley 244: fourth auxiliary pulley
250: wire saw 260: tension pulley
300: lifting means 310: magnet member
320: lifting cylinder 330: moving wheel
340: Bracket 350: Horizontal bolt
400: milling means 410: X axis rail
420: Y-axis rail 430: Z-axis rail
440: milling body 450: milling motor
460: spindle 470: milling cutter
L: Lug Body W: Lug Wings

Claims (6)

A main body frame that can be attached to and detached from the hull in which the lug is installed, cutting means for cutting the lug by using a wire saw provided on one side of the main body frame, and lifting and lowering the main body frame provided at the corners of the main body frame, respectively. In a lug cutting device comprising a means,
Lug cutting and milling apparatus, characterized in that provided in the center of the main frame frame further comprises a milling means for cutting the cut surface of the lug cut by the cutting means. The method of claim 1,
The milling means,
X-axis rails provided along the longitudinal direction on both upper surfaces of the main body frame, Y-axis rails seated on the X-axis rails and transportable along the X-axis rails, and seated on the Y-axis rails; A milling body transportable along an axial rail, a milling motor mounted to the milling body, a spindle axially coupled to the milling motor shaft, and a milling cutter coupled to the spindle to cut the lug Lug cutting and milling equipment. The method of claim 2,
Lug cutting and milling device, characterized in that the milling body Z-axis rail is formed so that the milling motor, the spindle and the milling cutter can be transferred in the vertical direction. The method according to claim 1 or 2,
The cutting means,
A main cutting motor installed at one upper side of the main body frame, a main pulley axially coupled to the main cutting motor and rotating at a lower portion of the main body frame, and an actuator provided on both lower surfaces of the main body frame in a longitudinal direction; Lug cutting and milling apparatus, comprising one or more auxiliary pulleys coupled to both actuators and movable in a longitudinal direction, and a wire saw wound around the main pulley and the auxiliary pulleys in a closed loop. . The method of claim 4, wherein
Lug cutting and milling device, characterized in that the other lower surface of the body frame is further provided with a tension pulley for maintaining the tension of the wire saw. The method according to claim 1 or 2,
The lifting means,
Lug cutting and milling apparatus comprising a magnet member provided at each corner of the body frame, a lifting cylinder vertically installed adjacent to the magnet member, and a moving wheel coupled to the rod of the lifting cylinder. .

Images