JP6088351B2 - Cutting device - Google Patents

Description

  The present invention is used, for example, to provide an opening in the iron shell for passing through a cooling pipe of a stave cooler that protects the iron core of the blast furnace from high heat during construction of the blast furnace. The present invention relates to a cutting device for cutting an iron skin to form an opening in a later vertical or inclined iron skin.

  Conventionally, for example, when constructing a blast furnace, the iron skin of the blast furnace is divided and manufactured at a manufacturing factory, and the iron skin that has been divided and manufactured is assembled and welded at a construction site (installation site). Things have been done. Inside the blast furnace, there is a stave cooler that protects the iron skin from high heat, and the cooling pipe for supplying and discharging the cooling liquid of the stave cooler must penetrate outside the blast furnace iron skin. For this reason, it is required to form an opening (hereinafter also referred to as an iron opening) in the iron skin. Normally, the blast furnace is constructed by assembling the separately manufactured iron skin at the installation site, etc., but the opening of the iron skin is usually formed when the iron skin is divided and manufactured before installation. Is. It is conventionally known that the iron skin opening is cut using a cutting device. As this cutting device, a device that forms a simple circular opening (see, for example, Non-Patent Document 1) or a device that forms an opening having a desired shape (see, for example, Patent Document 1). It has been known.

  The cutting apparatus disclosed in Non-Patent Document 1 or Patent Document 1 described above, in the case of forming an opening in the iron skin, cuts the iron skin divided and manufactured at the production factory in a horizontal state and then downwards. By operating the torch, a simple circular opening or an opening cut in accordance with a desired shape is formed. When constructing a blast furnace, the iron skin, which is divided and manufactured at the production plant, is transported to the installation site to perform assembly welding of the blast furnace. In that case, it is necessary to install a stave cooler inside the blast furnace, and to connect the cooling pipe of the stave cooler to the outside of the iron skin through the iron skin opening.

“IK-70”, [online], Koike Oxygen Industry Co., Ltd. [searched on May 1, 2013], Internet <URL: http: // www. koike-japan. com / jp / products / datasheet / ik-70 />

JP 2003-251464 A

  However, when constructing an iron skin that has been separately manufactured by performing assembly welding at the construction site, it is necessary to form an iron skin opening that will interfere with the welded part of the iron skin that has been separately manufactured. Since this part becomes an obstacle to welding in the field, prior factory processing is not possible. Therefore, the opening of the part needs to be cut at the construction site after the work of assembling and welding the divided iron is completed. And since the iron shell after completion | finish of the operation | work of assembly welding is in the perpendicular | vertical or inclined state, it is necessary to use a cutting device according to the state of inclination of an iron skin.

  In the cutting device described in Non-Patent Document 1, even if the state of the iron skin is vertical or inclined, the cutting device itself is installed in the vicinity of the iron skin and is parallel to the inclined state of the iron skin. Thus, by changing the angle of the front end side of the cutting device, a constant circular cutting can be performed on the surface of the iron skin. However, in the cutting device described in Non-Patent Document 1, since the cutting torch part of the cutting device only moves in parallel to the surface of the iron skin, the iron skin can be applied to the surface of the iron skin at any angle. On the other hand, only a simple circular opening can be formed.

  By the way, the cooling pipe of the stave cooler has to be pulled out in the horizontal direction regardless of the inclination angle of the iron skin. Therefore, the gentler the inclination angle, the larger the opening area than the opening formed in the vertical iron skin. A cutting surface to be an opening is required, but the cutting device described in Non-Patent Document 1 cannot form a cutting surface having such a shape. Furthermore, since the shape and number of cooling pipes that penetrate the iron skin differ depending on the type of stave cooler, the shape of the iron skin opening must be cut when the shape of the iron skin opening is not a simple circle. There may be. However, the cutting device described in Non-Patent Document 1 cannot cut an opening having a shape other than a simple circle.

  On the other hand, the cutting device described in Patent Document 1 is capable of cutting an opening having a desired shape. However, since it is a device premised on use in a horizontal state, it is vertical or inclined at the site. It cannot be used in a different posture. Even if the cutting device is used in a posture in accordance with the state of the iron skin, it is very difficult to control the operation of the cutting torch by the weight of the cutting device itself.

  Accordingly, the present invention provides a cutting method capable of easily and reliably forming an opening having a desired shape in a vertical or inclined core after completion of assembly welding of the core manufactured separately at a blast furnace construction site. The device is to be provided.

  In order to solve the above-mentioned problems, the present invention corresponds to claim 1 and is provided with a plate having an opening, which is attached to a material to be cut so as to be vertical during use, and a cutting machine attached to the plate. A main body, and the cutting machine main body is attached to a pair of first slide frames arranged in the vertical direction and extending in the horizontal direction, and a first guide block constituting the first slide frame. And a slide table having a second slide frame that slides along the first slide frame and extends in a direction orthogonal to the pair of first slide frames, and a second slide frame that constitutes the second slide frame. A cutting head portion that is attached to the two guide blocks and has a cutting head body and a cutting torch portion that slides within the cutting head body A constant load spring device that is attached to the second slide frame and supports the cutting head portion via a connecting member, and is attached to the second slide frame and controls the operation of the cutting head portion. A control unit, and a pair of support members attached to the second slide frame, and provided on the front end side of the support members, the angle can be freely changed along the material to be cut A cutting torch portion that is slidably supported in the axial direction on the cutting head body that is attached to a second guide block that moves along the second slide frame. When the cutting head body is engaged with the copying rail and the cutting head body moves in the vertical plane along the first and second slide frames, the cutting torch portion is moved to the copying rail. In accordance with the angle by moving while keeping a distance to the workpiece by sliding in the cutting head body, the cutting device so as to opening cleavage of the workpiece.

  In the above configuration, the cutting torch portion of the cutting head portion is provided with a guide member, the copying rail has a cross-sectional shape having a groove for engaging the guide member, and the groove portion of the copying rail is By moving the guide member of the cutting torch part, the cutting torch part slides within the cutting head body.

  Furthermore, a ring-shaped rotatable magnet roller surrounding the cutting torch portion is provided at a position corresponding to the inner peripheral edge of the opening of the plate on the tip side of the cutting head portion, and the magnet roller is connected to the control portion. By the operation control, the cutting head portion is rotated while being adsorbed to the inner peripheral edge of the opening of the plate, so that the cutting head moves according to the shape of the opening of the plate so that the material to be cut can be cut.

  According to the cutting device of the present invention, even when the material to be cut is inclined, the cutting machine main body is attached to the plate installed in the vertical direction, and the column material of the cutting machine main body is cut. A scanning rail is provided so that the mounting angle can be freely changed in accordance with the inclination angle of the material, and a cutting torch portion slidable in the cutting head body is provided in the groove portion of the scanning rail. Since the guide member is engaged, when the cutting head body is moved in the vertical direction along the second slide frame, the cutting torch follows the copying rail arranged in accordance with the inclination angle of the material to be cut. The part can be moved while being slid by being regulated by the copying rail. Therefore, the distance from the cutting torch part to the workpiece can be changed according to the inclination angle of the workpiece. As a result, the distance from the crater of the cutting torch part to the cut surface of the material to be cut can be kept almost constant regardless of the angle of the material to be cut, so that the passage of fire becomes worse. It is possible to reduce notches and cutting defects that occur due to this.

  Regardless of the inclination angle of the material to be cut, the copying rail is also attached at the inclination angle, and the cutting torch part is moved along the copying rail so that the cutting torch slides horizontally in the cutting head body. Since it can be moved, it can cut | disconnect so that the cut surface of the opening part of a to-be-cut material may become horizontal.

It is a schematic side view which shows the state which attached the cutting device of this invention to the blast furnace iron skin. It is an AA direction arrow line view of FIG. It is a BB direction arrow line view of FIG. It is the expansion schematic of the x section of FIG. FIG. 4 is an enlarged schematic view of a portion y in FIG. 3. It is a partial expanded schematic sectional view which shows the state which the magnet roller of the cutting head main body contacts the inner peripheral edge of the opening part of the guide plate in the cutting device of this invention. It is a schematic sectional drawing which shows the relationship between the piping for cooling of a stave cooler, and the opening part of an iron skin.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The drawings are provided for purposes of illustration only and are merely representative of typical embodiments of the invention.
These drawings are provided to facilitate understanding of the present invention and do not limit the scope or applicability of the present invention. In order to clearly and easily understand the contents shown in the drawings, these drawings are not necessarily drawn to scale, and are further described with some parts omitted.

  1 to 3 show an example in which the cutting apparatus of the present invention is applied to form an opening in a blast furnace iron skin.

  The cutting apparatus according to the present invention includes a cooling pipe 5 for cooling a stave cooler 4 with respect to a vertical or inclined iron skin 2 after assembling and installing the iron skin 2 that is divided and manufactured at a production factory. Is an apparatus suitable for forming the iron skin opening 3 in order to take out the outside of the iron skin 2.

  That is, as shown in FIG. 1, the cutting device 1 of the present invention includes a guide plate 6 that is mounted and positioned in the vertical direction regardless of the inclination angle of the blast furnace core 2 assembled and welded on site. A cutting machine main body 7 which is detachably attached to the guide plate 6 so as to form an opening 3 in the iron skin 2 following an opening 6a having an arbitrary shape formed in the guide plate 6; It is set as the structure provided with.

  The guide plate 6 is formed with an opening 6a that matches the shape and size of the iron opening 3 to be formed in the iron 2. The iron 2 at a position corresponding to the location where the iron 2 is cut. The guide plate 6 is guided on the inner peripheral edge of the opening 6a of the guide plate 6 by following a magnet roller of a cutting head portion described later.

  There are various methods for attaching the guide plate 6 to the iron skin 2. For example, a plurality of holes are formed in the four corners of the guide plate 6 or where the openings 6a are not formed, and the legs 8 with the magnets 9a are inserted into the holes and attached to the inclined iron. It is attached to the surface side of the skin 2. For this purpose, the leg portion 8 is inserted into the hole of the guide plate 6 and attached with a screw shaft 8a attached with a nut 8b, a magnet attachment portion 9 attached to one end portion of the screw shaft 8a in a swingable manner, The magnet mounting portion 9 is provided with a magnet 9a having a different size. As a result, the guide plate 6 can be attached to the iron skin 2 via the magnet 9 a attached to the magnet attaching portion 9 of the leg portion 8. That is, the screw shaft 8a of the leg portion 8 attached to the guide plate 6 is moved in the axial direction by adjusting the nut 8b, and attached so as to be vertical regardless of the angle of the vertical or inclined iron skin 2. Have been able to.

  Next, the alignment of the guide plate 6 with respect to the iron skin 2 is performed by using a ruler (not shown) written in advance on the opening forming portion of the iron shell 2 and a ruler (not shown) written on the guide plate 6. It can be done by combining. In the alignment of the guide plate 6 with respect to the iron shell 2, a magnet is used, so that fine adjustment is possible even when the initial mounting position is deviated from the desired position, and to the desired position where the rules are aligned. It can be corrected. In addition, as long as the attachment to a desired position can be performed, it may be performed by other methods regardless of the alignment by ruled lines.

  Note that the guide cooler 6 and the cutting machine body 7 are arranged vertically regardless of the inclination of the iron shell 2 as shown in FIG. However, since the cooling pipe 5 needs to extend in the horizontal direction regardless of the inclination of the iron skin 2 and the stave cooler 4, it does not interfere with the cooling pipe 5 regardless of the inclination of the iron skin 2 and the stave cooler 4. This is because it is necessary to obtain a horizontal cut surface of the iron skin opening 3 as described above.

  The cutting machine body 7 is a portable gas cutting machine, and as shown in FIGS. 1 and 2, a slide table unit 10 that can be detachably attached to the guide plate 6 and the slide table unit. 10 using a cutting head portion 11 having a cutting head body 12 and a cutting torch portion 13 that are attached so as to be movable in the biaxial directions of X and Y, and a wire 15 as a connecting member attached to the slide table portion 10. A constant load spring device 14 connected to the cutting head portion 11 and a rotating operation of a magnet roller 33 which will be described later so that the cutting head portion 11 is attached to the slide table portion 10 along the opening 6 a of the guide plate 6. And a control unit 16 to be controlled.

  As shown in FIG. 2, the slide table unit 10 includes a pair of slide frames (first slide frames) 17a and 17b extending in the horizontal direction (X direction) to form a rectangular mold, A pair of connection frames 19a, 19b, which form a frame with a pair of first base frames 20 to be described later by connecting both ends to each of the first slide frames 17a, 17b, and a first slide frame 17a. , 17b extending in the Y direction which is a direction orthogonal to the first slide frames 17a, 17b so as to be attached to the pair of first slide frames 17a, 17b at the intersections with the first slide frames 17a, 17b. A single slide frame (second slide frame) 18 configured to slide along 17b; It has been.

  Each of the first slide frames 17a and 17b includes a first base frame 20 made of a lightweight material such as aluminum, an auxiliary plate 20a attached and fixed to the surface of the first base frame 20, and the auxiliary A first linear guide 21 comprising a first slide rail 22 fixedly attached to the surface of the plate 20a and a first guide block 23 that engages with the slide rail 22 and slides with low friction is provided. It is configured. The auxiliary plate 20a may be omitted.

  Of the first slide frames 17a and 17b, the first base of the first slide frame 17a on the upper side when used (when the opening 3 is cut with respect to the assemblage welded iron skin 2) The frame 20 has a locking portion 20b on the side opposite to the side where the linear guide 21 is provided, and is fastened with bolts (not shown) at one or a plurality of locations to be attached to and supported by the upper side of the guide plate 6 during use. It is attached by fixing methods such as.

  As shown in an enlarged view in FIG. 4, the locking portion 20 b is one in which one end side is attached to the first base frame 20, and the other end side is opened so that the interval gradually increases. It has a groove portion 24 between itself and the base frame 20 and constitutes a wedge-shaped hook portion. By engaging the locking portion 20b constituting the hooking portion on the upper side of the guide plate 6 and superimposing the slide table portion 10 on the guide plate 6, the upper side of the guide plate 6 acts as a wedge depending on its thickness. It can be fixed by. This prevents the slide table portion 10 (cutting machine body 7) from dropping with respect to the guide plate 6 and restricts horizontal movement.

  Further, of the first slide frames 17a and 17b, the first base frame 20 of the first slide frame 17b on the lower side when in use is provided with a rotating clamp 20c by a handle lever 20d. Yes. By operating the handle lever 20d of the holding tool 20c, the tongue 20e is rotated, and the guide plate 6 is held between the tongue 20e and the lower base frame 20. Thus, the guide plate 6 and the cutting machine main body 7 can be firmly fixed by hooking the locking portion 20b on the guide plate 6 attached to the iron shell 2 and holding it with the holding tool 20c. Can do.

  The second slide frame 18 includes a second base frame 25 made of a lightweight material such as aluminum, a second slide rail 27 attached and fixed to the surface of the second base frame 25, and the slide rail 27. And a second linear guide 26 composed of a second guide block 28 that slides with low friction and engages with the first slide frame 17a, 17b. The first guide block 23 is attached. As a result, the second slide frame 18 is moved along the X direction (horizontal direction) along the first slide rails 22 of the first slide frames 17a and 17b together with the first guide blocks 23 of the first slide frames 17a and 17b. It is possible to slide.

  In the above configuration, since the first base frame 20 and the second base frame 25 are both made of a lightweight material, the weight of the cutting machine body 7 can be suppressed, and when attached to the guide plate 6, The load applied to the guide plate 6 can also be suppressed. When the cutting machine body 7 is attached to the guide plate 6 and the fixing of the guide plate 6 to the iron shell 2 by the magnet 9a becomes unstable due to the weight of the cutting machine body 7, the leg provided with the magnet 9a. The portion 8 may be welded directly or indirectly to be securely fixed to the iron skin 2.

  As shown in FIG. 3, the second base frame 25 has a shape in which the cross-sectional shape is bent in an L shape at the attachment position of the second linear guide 26. Thereby, even if it is comprised with lightweight materials, such as aluminum, intensity | strength can be increased. In FIG. 3, the legs 8 attached to the guide plate 6 are omitted.

  Further, as shown in FIGS. 2 and 3, a second linear guide 26 is attached to one end side of the second base frame 25 which is an upper portion when used and the other end side which is a lower portion when used. The wide portions 25a and 25b are formed so as to be further bent from the tip of the L-shaped bent portion so as to be wider than the bent portion. That is, at the portion where the wide portions 25a and 25b are formed, the cross-sectional shape of the second base frame 25 is configured to be bent in a crank shape, and the wide portions 25a and 25b are attached to the first guide block 23, respectively. To.

  Furthermore, the longitudinal direction of the first base frame 20 and the second base are provided on the surface of the second base frame 25 opposite to the mounting surface to the first guide block 23 in the wide portions 25a and 25b. In FIG. 1 and FIG. 2, the upper and lower portions 2 are arranged so that a pair of strut members 29 made of a light material such as aluminum extending in a direction (Z direction) orthogonal to the longitudinal direction of the frame 25 face each other. It is attached to the place.

  At both ends of the pair of support members 29, both end portions of the copying rail 30 are attached so as to connect the support members 29 to each other. A long hole 29a extending in parallel with the length direction (Z direction) of the column material 29 is formed on the distal end side of the pair of column materials 29, and both ends of the copying rail 30 can freely be connected to the long hole 29a. It is slidably attached to. Further, at least one end side of the scanning rail 30 is formed with a long hole 30 a shorter than the long hole 29 a of the support material 29 in the longitudinal direction of the scanning rail 30.

  The copying rail 30 is attached to the elongated hole 29a of the support rail 29 by inserting an engaging bolt through one end of the copying rail 30 into the elongated hole 29a of the supporting pillar material 29 and the elongated hole 30a of the copying rail 30. It is attached by a method using a fastener 34 such as fixing the bolt with a nut. In addition, the other end side of the copying rail 30 is fastened to the long hole 29a of the other column member 29 with a fastener 34 so that the positions of both ends of the copying rail 30 can be arbitrarily changed. Of course, it may be attached by other methods.

  As a result, the copying rail 30 is slid at both ends in the long hole 29a of the support material 29 and is also slid in the long hole 30a of the copying rail 30 so as to match the inclination angle of the iron skin 2. The mounting angle of the copying rail 30 can be freely changed.

  Further, as shown in an enlarged view in FIG. 5, the copying rail 30 has a U-shaped cross-sectional shape, and a guide groove 31 having a U-shaped inner periphery in the extending direction of the copying rail 30. Is formed. The groove 31 may have a cross-sectional shape other than the U-shape, such as an H shape, as long as a later-described roller 32 can be engaged.

  The cutting head unit 11 includes a cutting head main body 12 and a cutting torch unit 13. The cutting head main body 12 is configured to be attached to the second guide block 28 of the second slide frame 18, and the entire cutting head portion 11 is slidable along the second slide rail 27. .

  The cutting head main body 12 is provided with a hole in order to slidably arrange a motor (not shown) for driving a magnet roller 33 to be described later and a cutting torch portion 13 provided on the distal end side. And a configuration provided with a ring-shaped magnet roller 33 that is rotatably fitted to the distal end side (iron skin 2 side) of the cylindrical portion 12a. Has been.

  The magnet roller 33 is composed of an electromagnet, and the rotation of the magnet roller 33 can be controlled by an on / off operation of a switch (not shown) provided in the control unit 16. The magnet roller 33 is positioned at the height of the inner peripheral edge of the opening 6 a of the guide plate 6 when the cutting machine body 7 is attached to the guide plate 6. As a result, the magnet roller 33 is actuated by a switch provided in the control unit 16 so that the magnet roller 33 is attracted to the inner peripheral edge of the opening 6a of the guide plate 6 by a magnetic force as shown in FIG. By rotating, the cutting torch part 13 can be moved following the opening 6a.

  The magnet roller 33 is not composed of an electromagnet, but may be composed of, for example, a permanent magnet or the like, as long as the magnet roller 33 can be fixed to the inner peripheral edge of the opening 6a of the guide plate 6. Also good.

  The cutting torch portion 13 is attached so as to be slidable in the axial direction (Z direction) inside the cylindrical portion 12a of the cutting head body 12. Furthermore, a roller (small wheel) 32 is provided on the base end side (the copying rail 30 side) of the cutting torch part 13 via an attachment member 32a. When the roller 32 rotates in the groove 31 of the copying rail 30, the cutting torch portion 13 can move along the copying rail 30. At the same time, when the cutting head main body 12 moves along the second slide rail 27, the cutting torch portion 13 can be moved according to the mounting angle of the copying rail 30.

  With such a configuration, the cutting head portion 11 slides along the second slide rail 27 by making the mounting angle of the copying rail 30 parallel to the inclination of the iron skin 2, and At this time, the cutting torch portion 13 rolls in the groove 31 of the copying rail 30 with respect to the cutting head main body 12 while the roller 32 is regulated, so that the cutting torch portion 13 follows the mounting angle of the copying rail 30. It is moved in the Y direction while sliding in the direction.

  That is, as shown in FIG. 1, the distance from the cut surface of the iron shell 2 to the tip (crater) of the cutting torch part 13 can be made constant at any location. Therefore, the distance between the cut surface of the iron skin 2 and the tip portion (crater) of the cutting torch part 13 does not change, and the position of the flame that hits the cut surface of the iron skin 2 changes to give the cut surface. There is no such thing as changing heat. Thereby, in this invention, the passage of fire does not worsen to the cut surface of the iron skin 2, and it can prevent that a notch enters into the cut surface of the iron skin 2, and generation | occurrence | production of a cutting defect.

  Note that the mounting angle of the copying rail 30 is not necessarily parallel to the iron skin 2. If there is little change of fire to the cut surface of the iron skin and there is no risk of notching or cutting failure, the cutting torch is caused by the inclination of the copying rail 30 not being parallel to the iron skin 2 The distance from the cut surface of the iron shell 2 at the tip (crater) of the portion 13 may vary depending on the location.

  The constant load spring device 14 is fixedly attached to the wide portion 25 a of the second base frame 25, and is integrated with the movement of the second slide frame 18 along the first slide rail 22. It can move along the slide rail 22.

  As the constant load spring device 14, various configurations have been proposed, but in the present embodiment, a type in which the wire 15 is pulled out (retracted) is used. The wire 15 is drawn from the apparatus main body, and the leading end of the drawn wire 15 is connected to the cutting head unit 11. In addition, you may use the type which pulls out (pulling in) the spring part wound by the drum which does not use a wire.

  The constant load spring of the constant load spring device 14 is a long leaf spring bent with a constant curvature, and the return force (load) generated when it is stretched in a straight line is constant regardless of the stroke. It is as having. By connecting the cutting head part 11 with such a wire 15 of the constant load spring device 14, the cutting head part 11 is suspended, but the weight of the cutting head part 11 is reduced to zero by the return force of the constant load spring. Alternatively, by making the state close to zero that does not affect the self-weight, the force applied in the vertical direction is canceled out, and a zero-gravity state in which the apparent weight of the cutting head unit 11 is zero can be achieved. Thereby, the cutting head part 11 can be kept constant.

  Further, due to the action of the constant load spring device 14, the weight of the cutting head portion 11 appears to be substantially the same as zero, so that the vertical slide by the second slide rail 27 of the second slide frame 18 becomes gravity. It can be made free without being affected. Further, since the first slide frames 17a and 17b can be slid in the horizontal direction by the first guide block 23, the first slide frames 17a and 17b and the second slide frame 18 can be moved in the same manner as in horizontal use. Within the range, that is, in the XY direction, the cutting head unit 11 can freely move on the vertical plane.

  Further, the control unit 16 is attached and fixed to the wide portion 25a of the second base frame 25 so as to be adjacent to the constant load spring device 14, and drives a motor (not shown) of the cutting head body 12 to drive the magnet roller 33. Control the rotation speed.

  That is, under the control of the control unit 16, the rotational speed of the magnet roller 33 can be changed according to the thickness of the iron shell 2 to be cut, and the magnet roller 33 is attracted to the inner peripheral edge of the opening 6a of the guide plate 6. The cutting torch part 13 can be operated by making it follow while rotating, and the iron-skin opening part 3 with high precision approaching a desired opening shape can be formed.

  Since the shape of the opening 3 to be formed in the iron shell 2 differs depending on the type of the stave cooler 4, the shape of the cooling pipe 5, and the like, by preparing a plurality of guide plates 6 with various openings, It can be appropriately selected and used, and a desired opening can be formed.

  Next, the process at the time of cut | disconnecting the opening part 3 of the iron skin 2 assembled and welded using the cutting device in this invention mentioned above is demonstrated.

  First, the guide plate 6 is attached to the iron skin 2 that has been assembled and welded (first step). In the first step, the guide plate 6 is attached so as to be vertical by adjusting the leg portion 8 at the time of attachment, no matter what angle the iron skin 2 is inclined. Furthermore, the leg portion 8 may be welded directly or indirectly to the core 2 in order to secure the guide plate 6 to the core 2 more reliably.

  Next, the cutting machine main body 7 is attached to the guide plate 6 fixed to the iron skin 2 (second step). In the second step, the locking portion 20b attached to the first base frame 20 on the upper side of the slide table portion 10 is hooked on the upper side of the guide plate 6 to lock the first base frame 20. The cutting machine body 7 is fixed by the action of the wedge by the portion 20b. On the other hand, by operating the handle lever 20d of the holding tool 20c attached to the first base frame 20 on the lower side to rotate the tongue 20e, the guide plate is moved between the first base frame 20 and the tongue 20e. 6 is pinched. Thereby, the slide table portion 10 of the cutting machine body 7 can also be attached so as to be vertical, and by the above-described attachment method, the cutting machine body 7 can be prevented from dropping, or by being wedged at the groove portion 24 of the locking portion 20b. Horizontal displacement can be regulated.

  Further, in the second step, the wire 15 of the constant load spring device 14 of the cutting machine body 7 is connected to the cutting head portion 11. Thereby, even if it connects so that the cutting head part 11 may be suspended, when the cutting head part 11 will be in a weightless state, the cutting head part 11 can be moved freely without applying a load also in a Y direction. .

  Next, by operating the cutting head portion 11 of the cutting machine body 7, the iron skin 2 is cut to form the opening 3 (third step). In the third step, first, the inclination of the copying rail 30 attached to the pair of support members 29 is adjusted to the inclination angle of the iron skin 2. Then, by engaging and rolling the roller 32 of the cutting torch portion 13 in the groove 31 of the copying rail 30, when the cutting torch portion 13 moves in the Y direction, the cutting head is adapted to the inclination of the copying rail 30. It slides in the cylindrical part 12a of the main body 12.

  At this time, the distance between the tip of the cutting torch portion 13 and the cut surface of the iron skin 2 is always constant by matching the copying rail 30 so as to be parallel to the iron skin 2, but it is not necessarily parallel. It is not necessary, but it can be shifted from parallel if it is nearly parallel, that is, even if the distance between the tip of the cutting torch 13 and the cutting surface of the iron shell 2 changes depending on the location, there is no effect on the fire. good.

  Further, in the third step, the cutting head portion 11 is provided with a magnet roller 33, and the magnet roller 33 is moved by being actuated by a switch of the control portion 16 so as to be attracted to the inner peripheral edge of the opening 6 a of the guide plate 6. Let At this time, the cutting head main body 12 of the cutting head portion 11 operates in the horizontal direction (X direction) along the first slide rail 22 via the first guide block 23 together with the second slide frame 18, The movement in the XY direction can be freely performed by the movement in the Y direction along the second slide rail 27 via the two guide blocks 28, and the opening according to the shape of the opening 6 a of the guide plate 6. The part 3 can be cut and formed in the iron skin 2.

  Further, as described above, the cutting head portion 11 is moved freely in a zero-gravity state, and the cutting torch portion 13 is slid along the copying rail 30 so that the iron skin 2 at the tip portion (crater) of the cutting torch portion 13 is slid. Since the distance from the cut surface of the guide plate 6 can be made constant or nearly constant, a desired iron skin opening 3 can be formed following the shape of the opening of the guide plate 6.

  In addition, this invention is not limited to embodiment mentioned above, For example, although the case where the iron shell 2 of a blast furnace was cut | disconnected was shown, it is not limited only to this and can be used with the same attitude | position. Any other material to be cut may be used as long as it is a thing. Further, although the case where the roller 32 to be engaged with the groove 31 of the copying rail 30 is attached to the cutting torch portion 13 is shown, the movement of the cutting torch portion 13 is regulated instead of the roller 32 and the groove of the copying rail 30 is Any guide member can be used as long as it can move along 31. Furthermore, it goes without saying that various modifications can be made without departing from the scope of the present invention.

6 Guide plate (plate)
6a Opening 7 Cutting machine body 10 Slide table part 11 Cutting head part 12 Cutting head body 13 Cutting torch part 14 Constant load spring device 15 Wire (connection member)
16 Control part 17a, 17b 1st slide frame (a pair of slide frame)
18 Second slide frame (one slide frame)
29 Prop material 30 Copy rail

Claims (3)

A plate with an opening formed on the material to be cut so as to be vertical when in use, and a cutting machine body attached to the plate;
The cutting machine main body is attached to a pair of first slide frames that are arranged in the vertical direction and extend in the horizontal direction, and a first guide block that constitutes the first slide frame. A slide table having a second slide frame that slides along the slide frame and extends in a direction orthogonal to the pair of first slide frames, and a second guide block that constitutes the second slide frame A cutting head body having a cutting head main body and a cutting torch section that slides within the cutting head main body, and a fixing head that is attached to the second slide frame and supports the cutting head section via a connecting member. It is attached to the load spring device and the second slide frame, and the cutting head portion It is equipped with a control unit for controlling the work,
And a pair of support members attached to the second slide frame, and a copying rail provided on the front end side of the support members, the angle of which can be freely changed along the material to be cut,
Further, a cutting torch portion supported slidably in the axial direction by the cutting head body attached to the second guide block moving along the second slide frame is engaged with the copying rail. Let
When the cutting head body moves in the vertical plane along the first and second slide frames, the cutting torch portion slides in the cutting head body according to the angle of the scanning rail. A cutting apparatus having a configuration in which an opening of the material to be cut is cut by moving while maintaining a distance to the material to be cut. The cutting torch part of the cutting head part is provided with a guide member, and the copying rail has a cross-sectional shape having a groove part for engaging the guide member,
2. The cutting apparatus according to claim 1, wherein the cutting torch portion slides within the cutting head main body as the guide member of the cutting torch portion moves through the groove portion of the copying rail. On the distal end side of the cutting head part, a ring-shaped rotatable magnet roller surrounding the cutting torch part is provided at a position corresponding to the inner peripheral edge of the opening of the plate,
The magnet roller is driven to rotate while being attracted to the inner peripheral edge of the opening of the plate by the operation control from the control unit, so that the cutting head moves according to the shape of the opening of the plate, and the workpiece is cut. The cutting device according to claim 1, wherein the cutting device is capable of being cut.

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