KR100695944B1 - Apparatus for cutting block attached space of square section - Google Patents

Abstract

A cutting apparatus for blocks attached to space of a square section is provided to easily cut and remove blocks, such as a top bridge pad, wrongly installed in a square section formed by an insulation panel and a top pad. A cutting apparatus for blocks attached to space of a square section includes a transfer table(100) having a guide device, a cutting driving unit(110) mounted at the center of the transfer table, a vibration converting unit(120) to convert a rotation force of the cutting driving unit into a lateral vibrating force, a vibration cutting unit(130) receiving the lateral vibrating force of the vibration converting unit and cutting the bottom of a workpiece, side frames(152) installed to the lower lateral sides of the transfer table to guide the movement of the transfer table, a travel driving unit mounted to one side of the transfer table to drive the transfer table along the side frames, a dust collecting unit(160) to remove chips generated by the vibration cutting units during cutting, and a switch(180) to control the cutting driving unit and the travel driving unit.

Description

Apparatus for cutting block attached space of square section}

1 is a cross-sectional view showing the cargo hold structure of the LNG carrier.

2 is a partial perspective view illustrating the operation of attaching the top bridge pad in the cargo hold structure shown in FIG.

3 is a front view showing an embodiment of a block cutting device attached to a rectangular cross-sectional space according to the present invention.

4 is a plan view illustrating the embodiment shown in FIG. 3.

5 is a cross-sectional view of the workpiece to be cut using the embodiment shown in FIG. 3.

<Description of Symbols for Main Parts of Drawings>

100: transfer table 102: guide roller

104: Rack Gear 106: Front and Rear LM Guide

110: cutting drive unit 112: the first servo motor

114: first bracket 116: drive shaft

120: vibration converter 122: coupler (Coupler)

124: eccentric shaft 126: housing

127: roller 128: eccentric guide

130: vibration cutting unit 132: sliding bar

134: left and right LM Guide 136: fixed bar

138: top 140: driving drive unit

142: second servomotor 144: reducer

146: second bracket 148: pinion gear

152: side frame 154: L-shaped member

160: dust collector 162: hood

164: hose connection 166: dust collecting hose

170: sensor 180: switch unit

The present invention is a device for cutting a block (block) attached to the rectangular cross-sectional space, more specifically, the top bridge installed in bad during the insulation panel (Insulation Panel) manufacturing process of the Liquefied Natural Gas Carrier (LNGC) A block cutting device attached to a rectangular cross-sectional space for cutting and removing a pad (TBP; Top Bridge Pad hereinafter referred to as TBP).

In general, liquefied natural gas (LNG) refers to a colorless transparent cryogenic liquid whose natural gas containing methane is cooled to minus 162 degrees and reduced its volume to one hundredth.

As such liquefied natural gas has emerged as an energy resource, an efficient transportation method that can transport a large amount from the production base to the receiving site of the demand in order to use this gas as energy has been considered. Natural gas carriers have emerged to transport gas offshore.

By the way, such a liquefied natural gas carrier should be provided with a cargo hold (Cargo) that can store and store the liquefied natural gas liquefied in a cryogenic state, there were a lot of difficulties due to the very demanding conditions. In other words, liquefied natural gas has a vapor pressure higher than atmospheric pressure, and has a boiling temperature of about 162 degrees Celsius, so that the cargo hold for storing the liquefied natural gas in order to safely store and store the liquefied natural gas is a material that can withstand ultra low temperatures, For example, it must be made of aluminum steel, stainless steel, 35% nickel steel, etc., and must be designed with a unique insulation structure that is resistant to other thermal stresses and heat shrinkage and prevents heat intrusion.

Here, we will first look at the cargo hold insulation structure of the LNG carrier. 1 is a cross-sectional view showing a cargo hold structure of a liquefied natural gas carrier ship, Figure 2 is a partial perspective view illustrating the operation of attaching the top bridge pad in the cargo hold structure shown in FIG.

1 and 2, an insulation panel 10 is formed by an epoxy mastic 12 and a stud bolt 14 inside the hull 1 of the LNG carrier. It is attached and fixed, this insulation panel 10 constitutes a secondary heat dissipation panel of the cargo hold.

In this case, an empty space of approximately 30 mm is formed between the insulation panels 10, and a flat joint 18 is inserted into the empty space. Thereafter, a top pad 20 is attached to the top of the insulation panel 10. In this case, the top pad 20 is not directly attached to the upper portion of the flat joint 18 inserted between the insulation panels 10. First, the triplex 24 is tripled by an adhesive. A top bridge pad 22, which is a block made of the same material as the top pad 20, is attached to the top of the triplex 24. The top pad 20 and the top bridge pad 22 constitute a primary heat dissipation panel of the cargo hold.

And when the corrugated membrane (30, Corrugated Membrane) having a corrugation shape is mounted on the top plane of the top pad 20 and the top bridge pad 22, the cargo hold wall surface is completed. At this time, the top pad 20 and the top bridge pad 22 is made of a reinforced polyurethane constituting the lower body and a plywood constituting the upper cover plate.

As such, when the cargo hold of the liquefied natural gas carrier is manufactured, in order to find out whether the cargo hold of the liquefied natural gas carrier is safe, the gas having different pressures are respectively injected into the inside and the outside of the cargo hold to measure their pressure change. Perform a gas leakage test. At this time, if there is no change in the pressure of the gas injected into the inside and the outside of the cargo hold, it is determined that the installation of the top bridge pad 22 is good, while the pressure of the gas injected into the inside and the outside of the cargo hold is the same. If it is, the installation of the top bridge pad 22 is determined to be bad. This is because the insulation panel 10 and the top pad 10 are almost integrally formed, so that the gas injected into the inside and the outside of the cargo hold may not leak from each other.

Therefore, if the pressures of the gas injected into the inside and outside of the cargo hold are the same through the gas leakage test, the top bridge pad 22 is cut and removed for repair of the cargo hold wall surface which is determined to be a defective installation. shall.

Conventionally, in order to remove the defective top bridge pad attached to such an insulation panel, the operator installed the top bridge pad was cut and removed by using a hand-held saw and a manual tool while moving directly along the cargo hold wall.

However, since the cutting and removal of the top bridge pad attached to the conventional insulation panel is mostly performed by the operator's manual work, there is a problem that various injuries and musculoskeletal disorders may be caused by the accumulation of fatigue of the operator.

In addition, the cutting and removal of the top bridge pad attached to the conventional insulation panel, the operator first performs the cutting operation with a hand-saw, then remove the cut top bridge pad using a variety of manual tools, thereby producing cargo hold There was a problem that the process takes a lot of time.

In addition, cutting and removing the top bridge pad attached to the conventional insulation panel may damage the good insulation panel and the left and right top pads while the operator cuts and removes the defective top bridge pad. There was a problem that could be knocked down.

Therefore, in the present invention, in order to overcome the problems of the prior art as described above, the defective top bridge pad attached to the square cross-sectional space formed by the insulation panel and the top pad is attached to the square cross-sectional space that can be easily cut and removed. It is a technical problem to provide a block cutting device.

In order to achieve the above technical problem, the block cutting device attached to the panel according to the present invention includes a transfer table having a guide means; A cutting drive unit mounted at the center of the transfer table; Vibration converter for converting the rotational force of the cutting drive unit to the left and right vibration force; Vibration cutting unit for cutting the bottom surface of the workpiece by receiving the left and right vibration force of the vibration conversion unit; Side frames respectively installed at both lower sides of the transfer table to guide driving of the transfer table; A driving driver mounted to one side of the transfer table to drive the transfer table along the side frame; A dust collecting unit for removing chips generated by the vibration cutting unit; And it provides a block cutting device attached to the rectangular cross-sectional space, characterized in that it comprises a switch unit for controlling the driving of the cutting drive unit and the driving drive unit.

In addition, the guide means is a guide roller mounted on the lower side of the one side of the transfer table so that one side of the transfer table is rolling on one side of the side frame, and the other side of the transfer table is sliding on the other side of the side frame It is preferable to include a plurality of front and rear LM Guide (LM Guide) consisting of a plurality of recess blocks provided on the other side lower portion of the transfer table and a plurality of protrusion blocks provided on the other side of the side frame. As a result, the transfer table is guided with almost no friction at the top of the side frame, so that the driving table can travel linearly.

The cutting drive unit may include a first servomotor mounted on an upper portion of the center of the transfer table; A drive shaft connected to the first servomotor; It is preferable to include a first bracket for fixing the first servomotor and the drive shaft to the transfer table. At this time, by using a servo motor as a driving means of the cutting driving unit, it is possible to accurately control the frequency of the vibration cutting unit driven by the cutting driving unit.

The vibration converter may include an eccentric shaft positioned to have an eccentricity at a center of a driving shaft of the cutting driving unit; A coupler connecting the drive shaft and the eccentric shaft; A housing mounted outside the drive shaft, the coupler, and the eccentric shaft; A roller mounted at a lower end of the eccentric shaft to reduce friction during driving of the eccentric shaft; And it is preferable to include an eccentric guide for limiting the movement path of the roller to convert the rotational force of the eccentric shaft into left and right vibration force. In this case, it is preferable to use a cam captive (Camflower) provided with a needle bearing inside the outer ring in contact with the eccentric guide, which is used as a cam mechanism or a linear guide roller As a result, it is compact and has the advantage of being able to be attached to a high rigidity shaft. In addition, it is able to withstand large impact loads with a cam captive, and has excellent rotational performance, so that it can be used in a device requiring high speed rotation. In addition, the eccentric guide preferably includes a front and rear guide groove open to move the roller back and forth, and a left and right guide wall closed to prevent the roller from moving left and right. At this time, the front and rear guide grooves and the left and right guide walls formed in the eccentric guide limit the movement path of the roller mounted on the eccentric shaft, whereby the rotational force transmitted from the cutting driving part is converted into the left and right vibration force.

In addition, the vibration cutting unit is connected to the eccentric shaft of the vibration conversion unit sliding bar left and right; A plurality of left and right LM guides for guiding the left and right vibrations of the sliding bar under the transfer table; A pair of fixing bars mounted vertically downward at both ends of the sliding bar; It is preferable to include a saw mounted between the lower end of the fixed bar so that the tooth is directed in the traveling direction of the transfer table.

In this case, the left and right LM guide is preferably composed of a plurality of groove blocks provided on the lower portion of the transfer table and a plurality of protrusion blocks provided on the sliding bar. As a result, the sliding bar may slide left and right at a lower friction state while sliding the lower portion of the transfer table.

The driving unit may include a second servo motor; A reducer mounted to a lower portion of the second servomotor; A second bracket for fixing the second servomotor and the reducer to the transfer table; And a pinion gear mounted to the output shaft of the reducer so as to correspond to the rack gear mounted in the longitudinal direction at one side of the side frame. In this case, the driving means of the driving unit may control the position and the speed by using a servo motor, and by mounting an additional reduction gear in the servo motor, the torque may be increased by adjusting the rotation speed of the servo motor. . In addition, a pinion gear is mounted on the reducer output shaft of the driving driving unit so as to be engaged with the rack gear mounted on one side of the side frame. Thus, the transfer table may be driven back and forth along the side frame.

In addition, it is preferable that a projection corresponding to the groove of the guide roller is formed on the opposite side of the gear surface of the rack gear so that the guide roller mounted on the lower side of the transfer table contacts and rolls. At this time, by the rolling motion between the guide roller and the protrusion, the transfer table can be stably moved back and forth on the side frame without shaking.

In addition, between the transfer table and the side frame is preferably equipped with a sensor for detecting both ends of the side frame so that the transfer table is traveling only within the length range of the side frame. Thus, when the transfer table performs a cutting operation while traveling on the side frame, it is possible to prevent various accidents that may occur due to the transfer table deviating from the limit of the side frame.

In addition, the sensor is a radial photo sensor (projection) for projecting the light in the direction of the side frame from the transfer table, and again detects the light reflected from the side frame (Photo Sensor). By using such a radial photosensor, it has the advantages of simple installation, contactless, fast response speed, high resolution, long life. However, in other embodiments, a conventional proximity sensor having a similar function may be used.

The switch unit may include a servo on switch configured to prepare a servo command following the cutting driving unit and the driving driving unit; A servo off switch for releasing servo command following the cutting drive unit and the driving drive unit; An emergency stop switch for shutting off the entire power supply in an emergency; A cutting on / off switch for turning on / off the cutting driving unit; A driving on / off switch for turning on / off an operation of the driving driver; A driving direction selection switch for switching the operation direction of the driving unit; Cutting speed adjusting dial for adjusting the speed of the cutting drive; And it is preferable to include a traveling speed adjusting dial for adjusting the speed of the driving unit. At this time, in the present embodiment, a portable type, for example, a handy type cutting device is configured so that the various operation switches and control dials are bundled into one switch unit and mounted on the transfer table, but in another embodiment, the robot type, for example, liquefaction If it is configured as a cutting device mounted on a dedicated device that can move the cargo hold of the natural gas carrier, it will be possible to perform the respective functions with only the operation of the wireless remote control using a well-known conventional remote control method.

In addition, the dust collecting unit preferably includes a hood positioned on both sides of the upper part of the workpiece to which the fixed bar of the vibration cutting unit is inserted, and a hose connection unit for connecting the dust collecting hose to the hood. As a result, while the bottom surface of the workpiece is being cut by the vibratory cutting unit, the chip that is continuously generated and interferes with the cutting operation can be removed through the hood.

First, prior to explaining a preferred embodiment of the block cutting device attached to the rectangular cross-sectional space according to the present invention, look at the workpiece to be cut using this embodiment, as shown in Figure 5, Insulation panel 10 forms one layer, and top pads 20 on both sides of the insulation panel 10 and top bridge pads 22 in the center form another layer. In this case, the top bridge pad 22 has a method of first attaching the triplex 24 on the insulation panel 10 and then separately attaching the triplex 24 to the insulation panel 10, which is different from that of the top pad 20. Different. As such, the top bridge pads 22 that are individually attached may be attached to one of them, but may be attached to the defective ones. Therefore, the top bridge pad 22 which is adhered to the defect must be removed by cutting for the reattachment process.

On the other hand, the workpiece to be cut using the present embodiment is not limited to the top bridge pad 22 that is badly attached, so if the block attached to the space having a square cross-section all the workpiece Can be.

Hereinafter, a block cutting apparatus attached to a rectangular cross-sectional space according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 4.

3 is a front view showing an embodiment of a block cutting device attached to a rectangular cross-sectional space according to the present invention, Figure 4 is a plan view showing the embodiment shown in FIG.

3 to 4, a preferred embodiment of the block cutting device attached to the rectangular cross-sectional space according to the present invention is a transfer table 100 provided with guide means on the left and right and the center of the transfer table 100 A cutting driving unit 110 positioned at an upper portion, a vibration converting unit 120 connected to a lower portion of the cutting driving unit 110 to convert rotational force of the cutting driving unit 110 into left and right vibration force, and the vibration converting unit ( 120 is connected to the vibration cutting unit 130 for cutting the bottom surface of the workpiece by receiving the left and right vibration force of the vibration conversion unit 120, and the side frame 152 respectively installed on both lower sides of the transfer table and Is mounted on one side of the transfer table 100 to drive the front and rear running of the transfer table 100 and the upper portion of the vibration cutting unit 130 and removes chips generated during cutting Dust collecting unit 160 and the transfer frame And a switch unit 180 mounted to the cable 100 to control driving of the cutting driving unit 110 and the driving driving unit 140.

The cutting driving unit 110 is provided at the center of the transfer table 100 to provide driving force for cutting.

The cutting driving unit 110 includes a first servomotor 112 generating a rotational force, a drive shaft 116 connected to the first servomotor 112, the first servomotor 112 and the drive shaft 116. It includes a first bracket 114 for fixing to the transfer table (100). At this time, in this embodiment, the AC servo motor is used as the first servo motor 106 to generate the driving force necessary for cutting. AC servo motors are somewhat more complicated than DC servo motors, but they can be more powerful than DC servo motors of the same size. In addition, the AC servo motor has a good heat dissipation characteristics because the stator is made of a winding, there is no brush and commutator has the advantage of having a long use time.

On the other hand, the rotational force generated from the cutting drive unit 110 is transmitted to the vibration conversion unit 120, the vibration conversion unit 120 is located so as to have an eccentricity in the center of the drive shaft 116 of the cutting drive unit 110. A housing surrounding the eccentric shaft 124, the drive shaft 116 and the eccentric shaft 124, and the drive shaft 116, the coupler 122, and the eccentric shaft 124. 126, the roller 127 mounted on the lower end of the eccentric shaft 124, and the eccentric for converting the rotational force of the eccentric shaft 124 to the left and right vibration force by limiting the movement path of the roller 127 Guide 128.

The drive shaft 116 of the cutting drive unit 110 is rotated by the driving of the first servomotor 112, in order to convert the rotational force on the fixed shaft center of the drive shaft 116 into a dynamic circular motion, The eccentric shaft 124 is connected to the lower end of the drive shaft 116. In this case, the eccentric shaft 124 is connected to have an eccentricity by a predetermined distance from the axis of the drive shaft 116 in parallel with the drive shaft 116. The coupler 122 is used for the connection between the drive shaft 116 and the eccentric shaft 124. In this embodiment, the coupler 122 and the eccentric shaft 124 are used separately, but in another embodiment, an eccentric coupler having an eccentric shaft 124 already provided on the coupler 122 is used. You may.

In addition, a roller 127 and an eccentric guide 128 are mounted at the lower end of the eccentric shaft 124. The roller 127 is for reducing friction generated between the eccentric shaft 124 and the eccentric guide 128 when the eccentric shaft 124 is circularly moved on the eccentric guide 128. In the present embodiment, the cam polo (Camflower) was used as the roller 127, which is used as a guide mechanism for the cam mechanism or the linear motion because the needle bearing is assembled therein. It is attached and used. Since the outer ring with the cam cap is rotated while directly contacting the inner surface of the eccentric guide 128, the outer ring is thickened to withstand the impact load, and the inner ring of the cap cap with the precise cage Since the attached needle roller is assembled, it is possible to prevent skew, that is, bending and skew due to the bending moment, thereby obtaining excellent rotational performance. However, in another embodiment, a ball bearing or a roller bearing may be used as the roller 127 instead of the camporo, but it is preferable to have a form that can be operated in the eccentric guide 128.

The eccentric guide 128 is a member for limiting the movement path of the roller 127, converting the circular motion of the roller 127 to the left and right vibration. That is, the eccentric guide 128 has a front and rear guide groove open to move the roller 127 in the front and rear directions, and the left and right closed so that the roller 127 cannot be moved in the left and right directions. A guide wall is provided. Therefore, when the roller 127 is in a circular motion, the roller 127 is free to move along the front and rear guide grooves of the eccentric guide 128 by the forward and backward motion components of the circular motion of the roller 127. In addition, the roller 127 is constrained by the left and right guide walls of the eccentric guide 128 and is converted into left and right vibration as much as the left and right movement components. As such, the vibration converting unit 120 converting the rotational force of the cutting driving unit 110 into the left and right vibration force is connected to the vibration cutting unit 130 and transmits the left and right vibration force to the vibration cutting unit 130.

The vibration cutting unit 130 is a sliding bar 132 is extended to the left and right about the eccentric shaft 124 of the vibration conversion unit 120, the transfer table 100 and the sliding bar ( 132 a plurality of left and right LM guide 134 mounted between, a pair of fixed bar 136 mounted vertically downward from both ends of the sliding bar 132, and the fixed bar 136 A saw 138 mounted between the lower ends.

The sliding bar 132 is a horizontal linear member that receives the left and right vibration force by the eccentric shaft 124, a plurality of left and right LM guides on the lower portion of the transfer table 100 and the upper portion of the sliding bar 132 ( 134 is mounted. That is, the plurality of recess blocks provided in the lower portion of the transfer table 100 and the plurality of protrusion blocks provided in the upper portion of the sliding bar 132 are fastened so that the sliding bar 132 is connected to the transfer table 100. In the lower part of the sliding motion with less friction to the left and right to be vibrated.

Both ends of the sliding bar 132 are mounted with a pair of fixing bars 136, respectively, so as to vertically downward from the sliding bar 132, the top 138 is mounted between the lower ends of the pair of fixed bars. do. At this time, the saw 138 should be mounted in the same direction as the direction in which the transfer table 100 is driven, because the running direction of the transfer table 100 is the cutting direction. Therefore, unlike the present embodiment, when using a two-blade saw, the mounting direction of the saw as described above may be ignored.

The dust collector 160 is mounted on an upper portion of the gap into which the pair of fixed bars 136 of the vibration cutting unit 130 are inserted, that is, on both sides of the gap between the workpieces. The dust collector 160 may include a hood 162 that absorbs chips generated after cutting, and a hose connector 164 for connecting a dust collector hose 166 connected to an external dust collector (not shown) to the hood 162. ).

The dust collecting unit 160 is for absorbing and removing chips generated by cutting the bottom surface of the workpiece by the vibration cutting unit 130, and the chips remain intact in the vicinity of the workpiece. This is to prevent damage or damage to the surrounding good structure.

One side of the transfer table 100 is mounted with a driving unit 140. The driving unit 140 is a device for driving the transfer table 100 back and forth along the upper portion of the side frame 152, the second servo motor 142 controlled by the switch unit 180, and the second The reducer 144 mounted on the servomotor 142, the second bracket 146 and the reducer 144 which fix the second servomotor 142 and the reducer 144 to the transfer table 100. And a pinion gear 148 mounted on the output shaft 147.

Since the second servomotor 142 of the driving driving unit 140 uses the same AC servomotor as the first servomotor 106 of the cutting driving unit 110 described above, repeated description thereof will be omitted.

The reduction gear 144 is mounted on the second servomotor 142. The speed reducer 144 is a speed converter using a gear ratio, and a main role of the speed reducer 144 is to reduce the speed of the second servomotor 142 by the required speed, instead of reducing the speed of the speed reducer 144. To produce a greater torque on the output shaft (147).

Looking at the operating principle of the driving unit 140, when a signal for the driving direction and the driving speed from the switch unit 190 is sent to the second servo motor 142, the signal from the second servo motor 142 A driving force corresponding to the second driving force is generated, and the driving force is transmitted to the reduction gear 142 connected to the second servomotor 142.

Thereafter, the driving force transmitted from the reducer 144 is converted into an appropriate rotation speed and torque, and the converted driving force is transmitted to the pinion gear 148 through the output shaft 147 of the reducer 144.

At this time, the output shaft 147 and the pinion gear 148 of the reduction gear 144 is mounted to pass through one side of the transfer table 100, the pinion gear 148 is the upper side of one side of the side frame 152 It is engaged with the rack gear (104, which is installed in the rack gear).

Accordingly, as the pinion gear 148 rotates in the forward or reverse direction, the transfer table 100 travels forward or backward on the side frame 152.

On the other hand, the side frame 152 is two linear members seated parallel to the upper surface of the left and right members of the workpiece. The side frame 152 preferably has a cross section of a profile structure to reduce weight. In addition, a plurality of L-shaped members 154 having bolt holes are mounted on the outer surface of the side frame 152. This is to fix the bolt so that the position of the side frame 152 is not changed after the side frame 152 is placed side by side on the upper left and right members of the workpiece.

The transfer table 100 has guide means 102 and 106 corresponding to the side frame 152, and the guide means 102 and 106 are provided on both sides of the transfer table 100 individually. .

First, a guide roller 102 is mounted on one side lower portion of the transfer table 100, that is, one side lower portion of the transfer table 100 on which the pinion gear 148 of the traveling driving unit 140 is located. The guide roller 102 is mounted so as to correspond to the rear projection of the rack gear 104 meshing with the pinion gear 148, whereby the guide roller 102 is engaged with the projection and rolling.

On the other hand, the recess block provided on the other side lower portion of the transfer table 100 and the protrusion block provided on the other side of the side frame 152 constitutes the front and rear L-M guide 106.

In addition, a sensor 170 for detecting the side frame 152 is mounted below the transfer table 100. The sensor 170 detects both ends of the side frame 152, thereby preventing various safety accidents that may occur when the transfer table 100 leaves the range of the side frame 152. In this embodiment, a radial photo sensor is used as the sensor 170, which projects light toward a side of the side frame 150 facing the transfer table 100, and reflects the reflected light of the projected light. It is a way of detection. The use of such a radial photosensor has the advantage of easy installation, high resolution, and long service life. However, other embodiments may use other types of proximity limit sensors.

In addition, there is a switch 190 for adjusting and manipulating the cutting driving unit 110 and the driving driving unit 140. The switch unit 190 includes a servo-on switch (not shown) for preparing the servo drive following the cutting drive unit and the driving drive unit, and a servo off for releasing the servo command following the cutting drive unit and the driving drive unit. OFF) switch (not shown), an emergency stop switch for shutting off all power required in case of emergency, a cutting on / off switch for turning on / off the operation of the cutting driver, and an operation of the driving driver. A driving on / off switch for turning on / off, a driving direction selection switch for changing an operation direction of the driving driver, a cutting speed adjusting dial for adjusting the speed of the cutting driving part, and a driving speed adjustment for adjusting the speed of the driving driver A dial is included. At this time, in the present embodiment, because it is configured as a portable cutting device, the various operation switches and adjustment dials are configured to be attached to the transfer table by tying one switch unit, but in another embodiment, the cargo type of the robot type, for example, LNG carrier If it is composed of a cutting device mounted on a robot that performs a cutting operation by itself, it is possible to perform the above functions with an external wireless remote control through a known common remote control method.

Briefly describing the operation method of the block cutting device attached to the rectangular cross-sectional space according to the present invention, if the operating signal is first transmitted from the switch unit 180 to the cutting drive unit 110 and the driving port eastern 140 The cutting driving unit 110 and the driving driving unit 140 are driven. The rotational force generated by the cutting driving unit 110 is transmitted to the vibration conversion unit 120 and converted into left and right vibrational forces, and the rotational force generated by the driving driving unit 140 moves the transfer table 100 back and forth. At this time, the left and right vibration force converted by the vibration conversion unit 120 gives a vibration to the saw 138 of the vibration cutting unit 130, thereby, the saw 138 to cut the lower end of the workpiece do. In addition, the dust collecting part 160 mounted on the gap between both sides of the workpiece is removed from the chip generated after cutting.

The block cutting device attached to the rectangular cross-sectional space according to the present invention has been described above. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the following claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

As described above, according to the block cutting device attached to the rectangular cross-sectional space according to the present invention, the work time and the number of people required for the removal of the defective top bridge pad attached to the insulation panel of the LNG carrier are greatly reduced. can do.

In addition, according to the block cutting device attached to the rectangular cross-sectional space according to the present invention, since the operator does not have to remove the defective top bridge pad along the cargo window of the liquefied natural gas carrier ship, when removing the defective top bridge pad Safety accidents and musculoskeletal disorders of various workers that can occur can be prevented.

 In addition, according to the block cutting device attached to the rectangular cross-sectional space according to the present invention, there is no risk that the operator accidentally breaks a nearby good structure while removing the defective top bridge pad by hand, thereby improving the completeness of the cargo hold.

Claims (12)

A transfer table having guide means; A cutting drive unit mounted at the center of the transfer table; Vibration converter for converting the rotational force of the cutting drive unit to the left and right vibration force; Vibration cutting unit for cutting the bottom surface of the workpiece by receiving the left and right vibration force of the vibration conversion unit; Side frames respectively installed at both lower sides of the transfer table to guide driving of the transfer table; A driving driver mounted to one side of the transfer table to drive the transfer table along the side frame; A dust collecting unit for removing chips generated by the vibration cutting unit; And It includes a switch unit for controlling the driving of the cutting drive unit and the driving drive unit Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The guide means, A guide roller mounted on one side of the lower side of the transfer table such that one side of the transfer table is rolling on one side of the side frame; A plurality of front and rear LM guide consisting of a plurality of groove blocks provided on the lower side of the other side of the transfer table and a plurality of protrusion blocks provided on the other side of the side frame so that the other side of the transfer table slides on the other side of the side frame Including (LM Guide) Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The cutting drive unit, A first servomotor mounted on the center of the transfer table; A drive shaft connected to the first servomotor; And a first bracket for fixing the first servomotor and the drive shaft to the transfer table. Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The vibration converter, An eccentric shaft positioned to have an eccentricity at a center of a drive shaft of the cutting driving unit; A coupler connecting the drive shaft and the eccentric shaft; A housing mounted outside the drive shaft, the coupler, and the eccentric shaft; A roller mounted at a lower end of the eccentric shaft to reduce friction during driving of the eccentric shaft; And It includes an eccentric guide for limiting the movement path of the roller, converting the rotational force of the eccentric shaft into left and right vibration force Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The vibration cutting unit, A sliding bar which is connected to the eccentric shaft of the vibration converter and vibrates from side to side; A plurality of left and right LM guides for guiding the left and right vibrations of the sliding bar under the transfer table; A pair of fixing bars mounted vertically downward at both ends of the sliding bar; It includes a saw mounted between the lower end of the fixed bar so that the tooth is directed in the traveling direction of the transfer table Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 5, The left and right LM guide is composed of a plurality of groove blocks provided on the lower portion of the transfer table and a plurality of protrusion blocks provided on the sliding bar. Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The driving drive unit, A second servomotor; A reducer mounted to a lower portion of the second servomotor; A second bracket for fixing the second servomotor and the reducer to the transfer table; And And a pinion gear mounted to the output shaft of the reducer so as to engage with the rack gear mounted in the longitudinal direction at one side of the side frame. Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 7, wherein Opposite side of the gear surface of the rack gear is formed with a projection corresponding to the groove of the guide roller so that the guide roller mounted on one side lower portion of the transfer table is in contact with the rolling motion Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, Between the transfer table and the side frame is equipped with sensors for detecting both ends of the side frame so that the transfer table is traveling only within the length range of the side frame Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 9, The sensor is a radial photo sensor for projecting light from the transfer table toward the side frame, and again detects the light reflected from the side frame Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The switch unit, A servo on switch for preparing a servo command following the cutting drive unit and the driving drive unit; A servo off switch for releasing servo command following the cutting drive unit and the driving drive unit; An emergency stop switch for shutting off the entire power supply in an emergency; A cutting on / off switch for turning on / off the cutting driving unit; A driving on / off switch for turning on / off an operation of the driving driver; A driving direction selection switch for switching the operation direction of the driving unit; Cutting speed adjusting dial for adjusting the speed of the cutting drive; And It includes a driving speed adjusting dial for adjusting the speed of the driving drive unit Block cutting device attached to the rectangular cross-sectional space characterized in that. The method of claim 1, The dust collecting part includes a hood positioned at both sides of the gap between the workpieces into which the fixed bar of the vibration cutting part is inserted, and a hose connection part for connecting the dust collecting hose to the hood. Block cutting device attached to the rectangular cross-sectional space characterized in that.

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