JP2787522B2 - Blowpipe drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow tube driving device for driving a blow tube for cutting a workpiece such as a slab.
The present invention relates to a blow-pipe driving device including a copying apparatus that controls a position of a nozzle tip of a blow-pipe according to a cross-sectional shape of a work.

[0002]

2. Description of the Related Art In general, there is an apparatus using a blow pipe as an apparatus for cutting a workpiece such as iron and steel. Conventional cutting of a workpiece by a blowpipe uses a blowpipe driving device that drives the blowpipe such that the separation distance between the nozzle tip of the blowpipe and the upper surface of the work and the moving speed of the blowpipe with respect to the work maintain predetermined conditions. ing.

[0003] In a conventional blow tube driving apparatus, a blow tube is mounted on a blow tube traversing table which is supported so as to be horizontally movable with respect to the apparatus body, and the blowing tube traversing table is driven in a cutting direction of a work. It is configured to cut a workpiece.

[0004]

By the way, as is well known, the cutting of a workpiece by a blowpipe is performed by first heating a cut portion to about 1350 ° C. with a flame of a blowpipe and blowing high-purity high-pressure oxygen onto the cut portion. This is performed by forming iron and blowing iron oxide having a melting point lower than that of the base material by an oxygen stream to form a groove in the work. Therefore, in cutting the work by the blowpipe, the separation distance between the nozzle tip of the blowpipe and the upper surface of the work, the moving speed of the blowpipe relative to the work, and the like are important conditions for determining whether or not cutting is possible and the efficiency.

However, the conventional blow-pipe driving apparatus has a structure in which the distance between the nozzle tip of the blow-pipe and the upper surface of the work cannot be changed during the cutting of the work. For this reason, in the conventional blow tube driving device, when cutting a work having a complicated cross-sectional shape, the gap from the nozzle tip of the blow tube to the top surface of the work is not constant, and the heating temperature of the work and the blowing speed of the blow tube are not uniform. As a result, there has been a problem that mistakes in cutting the work are likely to occur. The occurrence of such a cutting error becomes more remarkable when a cast piece, which is generally difficult to cut by a blowpipe, is used as a work, and also causes a reduction in the casting yield.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blower driving apparatus which can maintain an optimum cutting condition in a gap from a nozzle tip of a blower to an upper surface of a work according to a sectional shape of the work.

[0007]

According to the present invention, there is provided an overall positioning platform supported horizontally movable with respect to an apparatus main body, and an overall positioning platform which moves from a standby position and contacts a side surface of a work. A filler bar for positioning the blower, a blow-pipe traverse board supported slidably in the horizontal direction with respect to the entire positioning board, and a slidable support in the up-down direction with respect to the blow-pipe traverse board Blown pipe vertical feed platen,
A blow pipe mounted on the blow pipe vertical feed bed board, a transverse feed bed drive means for driving the blow pipe horizontal feed bed board, a vertical feed bed drive means for driving the blow pipe vertical feed bed board, and the blow pipe Board drive control means for controlling the drive amount of the lateral feed board drive means and the vertical feed board drive means such that the gap from the nozzle tip to the upper surface of the work takes an optimum value according to the cross-sectional shape of the work. Is obtained.

[0008]

According to the present invention, the horizontal drive position of the blowpipe lateral feed base plate and the vertical move position of the blowpipe vertical feed base plate with respect to the overall positioning base plate are controlled by the base drive control means. Is arbitrarily changed, and the gap from the nozzle tip of the blow pipe to the upper surface of the work is maintained at an optimum value according to the cross-sectional shape of the work.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the blowpipe driving apparatus according to the present invention has an overall positioning base plate 11 supported so as to be horizontally movable with respect to an apparatus main body 17, a casting base as a workpiece moving from a standby position. A filler bar 4 that contacts the side surface of the piece 3 to position the overall positioning platform 11; a blow tube lateral feed platform 10 slidably supported in the horizontal direction with respect to the overall positioning platform 11; A blow tube vertical feed base plate 9 slidably supported in the vertical direction with respect to the horizontal feed base plate 10, a blow tube 5 mounted on the blow tube vertical feed base plate 9,
Blow tube transverse feed drive motor 12 as a transverse feed plate drive means for driving blow tube transverse feed platen 10, blow tube vertical feed platen 9
Pipe vertical movement hydraulic cylinder 7 as a vertical feed bed driving means for driving the
Board drive control means for controlling the drive amount of the horizontal feed board drive means and the vertical feed board drive means such that the gaps H1 and H2 to the upper surface of the slab take an optimum value according to the cross-sectional shape of the slab 3. Hydraulic control unit 13 and blow tube lateral feed drive mode
It is constituted by a pulse transmitter or the like which is directly connected to the transmitter 12.

Here, the apparatus main body 17 and the overall positioning platform 11, the overall positioning platform 11 and the blow tube lateral feed platform 10, and the blow tube lateral feed platform 10 and the blow tube vertical feed platform 9 are provided with guide rails 17a, 11a, and 11a. 10a and guide bearing 11
b, 10b, and 9b make it possible to slide smoothly and accurately. Stopper 17b
Project from the apparatus main body 17. This stopper 17
The side end portion of the entire positioning board 11 abuts on b.

The blowpipe 5 is mounted on a blowpipe vertical feed base 9 by a blowpipe clamp 8 so as to be substantially perpendicular to the slab 3. The blow pipe 5 is supplied to the blow pipe vertical moving hydraulic cylinder 7 disposed between the blow pipe vertical feed base 9 and the blow pipe horizontal feed base 10 by oil supply.
When the blow pipe vertical feed base plate 9 slides in the vertical direction with respect to 0, it approaches or separates from the cast slab 3.

The amount of vertical movement of the blow pipe 5 is determined by controlling the amount of oil supplied to the hydraulic cylinder 7 for vertically moving the blow pipe by the hydraulic control unit 13.

The amount of oil supplied to the blow-pipe vertical moving hydraulic cylinder 7 is determined by the gaps H1, H2 from the nozzle tip 5a of the blow-pipe 5 to the upper surface of the slab 3, based on the horizontal feed coordinate position of the blow-pipe 5.
Is controlled to take an optimum value according to the cross-sectional shape of the slab 3.

On the other hand, the lateral feed of the blowpipe 5 is executed by driving the blowpipe lateral feed drive motor 12 based on a preprogrammed time schedule optimal for cutting the slab 3. That is, in FIGS. 1 and 2, the blow-pipe lateral feed drive motor 1 constituted by an inverter motor is used.
2 is driven, the drive sprockets 16A, 16A 'driven through the drive shaft 12a and the bevel gears 12b, 12c, 12d, 12e are rotated, and the drive sprockets 16A, 16A' and the driven sprocket 16B are rotated. , 16B ′ (supported on the apparatus main body 17) rotates. As a result, the blow-pipe traverse board 10 to which both ends of the blow-pipe traverse chains 6, 6 'are fixed moves horizontally along the rail 17a with respect to the overall positioning board 11, and the blow-pipe 5 Is traversed.

Hereinafter, a slab 3 having an H-shaped cross section will be described.
The operation of the above embodiment in the case of disconnecting is described.

In FIGS. 1 and 2, the cast piece 3 is conveyed on the roller table 1 below the torch, and a predetermined cutting position is fixed at a position corresponding to the nozzle tip 5a of the blow pipe 5. Protective covers 2 for preventing scattering of sparks at the time of cutting are arranged on both sides of the cut portion of the slab 3. In the state where the slab 3 is being conveyed on the lower torch roller table 1, that is, before the start of cutting, the filler bar 4 and the blowpipe 5 arranged on the overall positioning base plate 11 are respectively slabs. 3 is in a standby position away from the side.

In FIG. 1 and FIG. 2, when the cutting operation of the slab 3 is started, the blow tube lateral feed drive motor 12 is started. As a result, first, the blow tube lateral feed drive motor 1
The rack 1 integrated on the overall positioning base 11 via a torque keeper 14 (torque limiter having a pinion gear mounted on the outer periphery) disposed on the second drive shaft 12a.
5 is driven, and the overall positioning board 11 moves rightward in FIG. As the drive shaft 12a rotates, the splotters 16A and 16A 'also rotate to rotate the chain, so that the blow tube lateral feed base 10 moves together with the overall positioning base 11. The filler bar 4 is moved from its standby position by the movement of the overall positioning table 11 and is stopped by contacting the side surface of the slab 3.
Is set, and the blow pipe 5 is set at a fixed position.
At this time, the blowpipe 5 is ignited to be in a cutting standby state.

When the drive shaft 12a continues to rotate, the torque keeper 14 slips but the blow tube lateral feed base 10 reaches the drive shaft 12a because the overall positioning platform 11 is stopped with the filler 4 as a stopper and stopped. Chains 6, 6 'rotated via sprockets 16A, 16A'
Moved by And, as described above, the blow pipe 5
Is set to the home position, and the blow-pipe traverse drive motor 12
A predetermined transmission is applied to the blowpipe 5 in accordance with a preset cutting time schedule by a pulse transmitter (position detector) and a hydraulic control unit 13 which are directly connected to and incorporated in the apparatus.

As a result, the gaps H1 and H2 from the nozzle tip 5a of the blowpipe 5 to the upper surface of the slab 3 are controlled so as to take an optimum value according to the cross-sectional shape of the slab 3, while two points are shown in FIG. As shown by the chain line, the nozzle tip 5a of the blow pipe 5 is moved so as to draw an optimal trajectory for cutting the slab 3, and the slab 3 is cut. Here, in FIG. 2, the moving trajectory of the nozzle tip 5 a of the blowing pipe 5 to the right is the trajectory of the blowing tip 5 when cutting the slab, and the moving trajectory of the nozzle tip 5 a of the blowing pipe 5 to the left is the return movement. Each is shown.

Next, the returning operation of the blow pipe 5 to the standby position after the slab cutting is completed will be described. When the blow tube lateral feed drive motor 12 is rotated in the reverse direction, the rotational force is changed to the drive shaft 12a and the sprocket 16A,
The blown pipe lateral feed base 10 is returned to the standby position by being transmitted to the chains 6 and 6 'via 16A', but the rack 15 is driven via the torque keeper 14 at the beginning of the return operation, and at the same time, the sprockets 16A and 16A '. Is also driven, the overall positioning platform 11 and the blow tube lateral feed platform 10 return together (moving to the left in FIG. 2), and the overall positioning platform 1
When the side end portion of the sprocket 1 is stopped by contacting the stripper 17b, the slip keeper 14 slips and rotates,
6A and 16A continue to rotate, so that the blow tube lateral feed base plate 10 is moved by the chains 6 and 6 'to the blow tube 5 and the blow tube vertical feed base plate 9
Is put back to the standby position.

[0022]

According to the present invention, an erroneous cutting of a work having an irregular cross-sectional shape can be eliminated, and particularly when the work is a casting, the yield of casting can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a blow tube driving device according to an embodiment of the present invention.

FIG. 2 is a schematic front view of the blow tube driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Torch lower roller table 3 Cast piece (work) 4 Filler bar 5 Blow tube 6,6 'Blow tube horizontal feed chain 7 Blow tube vertical movement hydraulic cylinder 8 Blow tube clamp 9 Blow tube vertical feed plate 10 Blow tube horizontal feed plate 11 Overall positioning table Reference Signs List 12 blow tube lateral feed drive motor 13 hydraulic control unit 14 torque keeper (torque limiter) 15 rack 16A, 16A 'drive sprocket 16B, 16B' driven sprocket 17 device body 17a guide rail 17b stopper

Claims (1)

(57) [Claims] An overall positioning platform supported horizontally movably with respect to an apparatus main body; a filler bar that moves from a standby position and contacts a side surface of a work to position the overall positioning platform; A blow tube horizontal feed base plate slidably supported in a horizontal direction with respect to a positioning base plate; a blow tube vertical feed base plate supported slidably in a vertical direction with respect to the blow tube horizontal feed base plate; A blow pipe mounted on a blow pipe vertical feed base, a transverse feed base driving means for driving the blow pipe horizontal feed base, a vertical feed base driving means for driving the blow pipe vertical feed base, Board drive control means for controlling the drive amount of the lateral feed board drive means and the vertical feed board drive means so that the gap from the nozzle tip to the upper surface of the work takes an optimum value according to the cross-sectional shape of the work; Blow tube driving device comprising Place.