KR20010001375U - Cutting apparatus of continuous cast billet - Google Patents

Abstract

This paper relates to a device for cutting a billet slab with improved productivity, which can prevent safety accidents by cutting evenly and cutting molten steel at the time of cutting the billet slab cast for the first time after the start of casting. A base wheel 21 and 21a installed at a lower portion of the movable wheel and connected to the frame to form a support part; Rails 26 and 26a fixed by blocks on rail bases 24 and 24a supported by a pair of supports provided on the upper surface of the base, respectively; Clamps (30, 30a) mounted on the rails so as to be slidably mounted and mounted on blocks connected to each other by rods (28, 28a) and operated by air cylinders (31, 31a) to grip the gas cutter; A worm gear 33 which operates the spindle shaft 34 connected to the rod 28a to move the clamp on the rail, and is mounted on the base 32 on the side of the rail base; A fixed arm 39 installed at the front of the slide block 27 and equipped with a gas cutter high pressure valve regulator 36 and a lever 37 at the front end thereof; Mounted on the base 42 of the side of the support 23b, the cylinder 43 with a built-in piston with air circulation holes, the permanent magnet 48 mounted at the end of the cylinder rod, and the cylinder rod over the range of movement of the cylinder rod It is provided with the scale 46, the scale indication rod 45 of the scale, and the billet slab length measuring mechanism 50 which consists of the guide 47.

Description

Continuous cast billet caster cutting device {CUTTING APPARATUS OF CONTINUOUS CAST BILLET}

This paper relates to a device for cutting the first cast billet cast after initiation of casting during continuous billet casting. More specifically, it is possible to prevent safety accidents in advance because the cutting surface is even and prevents molten steel from scattering. It relates to a slab cutting device.

In the case of billet continuous casting, since the tundish nozzle is an open nozzle, the tumbler is blocked before the molten steel injection starts, and a filler made of a mixture of sand and carbon is introduced to the top. When the molten steel is opened after injecting molten steel into the mold, the filler injected into the nozzle flows into the mold, and when molten steel is manufactured into the cast steel, the filler is mixed into the cast steel to form a scum, pinhole, Blowholes are formed, resulting in poor quality of the cast.

When the cast steel is transferred to a post-process by rolling the wires in such a bad state, the cast steel may burst and the scrap cannot be used as a product.

In order to prevent this, the head portion of the billet cast steel which is cast for the first time after the start of casting is cut about 400 to 500 mm with a gas cutter and then transferred to the post process.

In addition, when taking the sample of the cast slab cast from a part of a billet slab, the billet slab is cut | disconnected about 200-300 mm.

As such, when cutting the cast part to cut the head portion of the first cast 10 produced after the start of casting or to take a sample, it is conventionally cut by the gas cutter 11, as shown in Figure 1, so the cutting surface is uneven In order to accurately measure the cutting length during the cutting operation, the operator may be injured by molten steel scattering when measuring the length using a forced scale, and the work load increases because the operator carries out the cutting operation by directly holding a heavy gas cutter. Several problems existed.

Therefore, the present invention is made to solve the problems of the prior art as described above, when cutting the billet slab head portion of the initial casting, or when cutting the slab for sampling, evenly cut surface and measuring the length of the cut portion safely and accurately The purpose is to provide a cutting device for billet cast steel which can prevent the accident and can reduce the workload because there is no molten steel scattering.

1 is a view showing a billet cast cutting operation according to the prior art,

Fig. 2 is a perspective view showing the billet slab cutting device of the present invention;

3 is a side view of the device shown in FIG. 2;

4 is a view showing a frame and support constituting the present design device,

5 is a view showing a clamp portion constituting the present design device,

6 is a view showing a clamp moving rail base constituting the present design device,

7 is a view showing a high pressure valve regulator of the gas cutter;

8 is a view showing a cylinder of the slab length measuring mechanism of the present invention device;

9 and 10 are views showing the operation of cutting the slab after measuring the cutting length of the billet slab using the present design device.

Explanation of symbols on the main parts of the drawings

10: Billet cast steel 11: Gas cutting machine 20: Movement wheel

22: frame 23: support 24: rail base

26: rail 28: connecting rod 30: clamp

31: Air cylinder 33: Worm gear 34: Spindle shaft

36: high pressure valve regulator 38: fixed arm 41: brake

43: cylinder 44: cylinder rod 45: indicator rod

46: scale 48: permanent magnet 50: caster length measuring instrument

In order to achieve the above object, the head cutting device of the billet slab of the present invention includes a base 21 having a pair of wheels for movement 2020a; 20b and 20c respectively installed at a lower portion thereof and connected to the frames 22 and 22a to form a support. , 21a); Rails 26 and 26a fixed by blocks 25, 25a; 25b and 25c on rail bases 24 and 24a supported by supports 23, 23a; 23b and 23c provided in pairs on the upper surface of the base, respectively; Clamps mounted on the rails slidably mounted and mounted on the blocks 27, 27a; 27b, 27c connected to each other by rods 28, 28a and operated by air cylinders 31, 31a to hold the gas cutter ( 30); A worm gear (34) mounted on the base (32) on the side of the rail base (24, 24a) is operated to operate the spindle shaft (34) connected to the rod (28a) to move the clamps (30, 30a) on the rails (26, 26a). 33); A fixed arm 39 installed at the front of the slide block 27 and equipped with a gas cutter high pressure valve regulator 36 and a lever 37 at the front end thereof; Mounted on the base 42 of the side of the support 23b, the cylinder 43 with a built-in piston with air circulation holes, the permanent magnet 48 mounted at the end of the cylinder rod, and the cylinder rod over the range of movement of the cylinder rod It is a structure characterized by including the scale 46, the scale indicator rod 45 of the scale, and the billet slab length measuring mechanism 50 which consists of the guide 47.

The present invention will now be described in detail with reference to the accompanying drawings, in which preferred embodiments are shown.

As shown in Figs. 2 and 3, bases 21 and 21a equipped with moving wheels 20, 20a, 20b and 20c are provided, and the base 21 and the base 21a are connected to the frames 22 and 22a. It is connected to each other to form a support structure, and two supports 23, 23a, 23b, and 23c are installed at the upper ends of the bases 21 and 21a, respectively, and rail bases 24 and 24a are installed at the upper ends of the pair of supports. A rail on which the clamps 30 and 30a are movably mounted in a horizontal direction on the slide blocks 27, 27a, 27b and 27c which are movably mounted on the upper center and the clamp bases 29 and 29a mounted thereon. 26, 26a are fixedly installed by the blocks 25, 25a, 25b, 25c, and the slide blocks 27, 27a and the slide blocks 27b, 27c are connected to each other by the rods 28, 28a.

In addition, as shown in FIG. 5, air cylinders 31 and 31a for operating the clamps 30 and 30a are connected to the air supply hoses 40 and 40a on the clamp bases 29 and 29a. .

As shown in Figure 6, the worm gear base 32 is fixed to the rail base (24, 24a) side, the worm gear 33 is installed on the top of the spindle shaft adjustment handle 35 is mounted, the spindle shaft of the worm gear ( 34 is connected to the middle of the rod 28a.

Next, as shown in FIG. 7, in front of the slide block 27, a regulator 36 equipped with a high pressure valve high pressure adjusting bolt 38 of a gas cutting machine is mounted at the front end thereof, and a lever 37 holding the bolt 38 is provided. The fixed arm 39 is mounted horizontally.

In this paper, the cutting length measuring mechanism 50 is installed on the pedestal 42 attached to the support 23b, as shown in FIGS. 4 and 8, when cutting the billet slab. Cylinder 43 with a built-in piston 51, a cylinder rod 44 connected to the piston with a permanent magnet 48 at the end thereof, and a scale installed at the top of the permanent magnet to measure the cutting length. Indicator rod 45 for indicating the length through the, the cylinder 46 is provided on the upper end of the cylinder rod operating range of the scale 46 indicating the length of the cut piece, and the guide 47 provided to guide the indicator rod 45 It is done by

In addition, the side of the base 21 in the present invention is provided with a brake 41 for fixing the present device in a fixed position to prevent rocking.

Hereinafter, the operation of the billet slab cutting device of the present invention configured as described above will be described with reference to FIGS. 9 and 10.

Before starting the cutting of the billet cast steel, insert the clamp (30, 30a) constituting this draft to operate the air cylinder (31, 31a) to fix it, and then press the lever (37) of the high pressure valve regulator (36). Tighten the bolt to the adjustment bolt 38 until just before the high pressure valve is operated.

When the continuous casting operation is started and the first billet slab is drawn out, it is moved to the cutting position and the gas cutting machine is ignited, and the billet slab cutting device of this paper is placed in front of the billet slab 10 to be cut for the first time as shown in FIG. Next, the permanent magnet 48 of the cutting length measuring device 50 is brought into contact with the tip of the billet slab 10.

Subsequently, when the billet slab cutting device is pushed toward the slab 10 as shown in FIG. 10, the piston rod 44 of the cylinder reverses the piston, and the air in the A portion of the cylinder 43 passes through the air circulation hole 49. As the cylinder rod 44 is retracted toward the billet cutting device side while exiting to the part B, the gas cutter is advanced to the cast steel 10 side, and the indicator rod 45 installed on the upper end of the permanent magnet 48 is interlocked and scaled backward. Make sure to read the scale in (46).

When the billet slab cutting device is pulled to the opposite side of the slab 10, the permanent magnet 48 is bonded to the slab 10, and the cylinder rod 44 tries to move forward to the slab 10 side. As the air escapes to the portion A through the air circulation hole 490, the cylinder rod 44 moves forward to the cast steel side, and the gas cutting machine moves backward to the cast steel side. At this time, the indicator rod 45 interlocks and moves toward the cast steel side of the scale. The scale can be read.

In this way, the billet cutting device is pushed to the cast steel side (cutting length becomes longer), or reversely pulled (cutting length becomes shorter), the cutting length is measured and placed at the billet cutting position. Fix it so as not to.

Next, the worm gear handle 35 is operated to push or pull the spindle shaft 34 to move the gas cutter fixed to the clamp 30 to the upper cutting position of the billet slab, adjust the gas flow rate to preheat, and after the gas is sufficiently warmed up Tightening the high pressure control bolt 38 of the high pressure valve regulator 36 of the cutter to operate the high pressure valve to cut the billet cast.

When the cutting is started, the worm gear handle 35 is operated to gradually traverse the gas cutting machine to cut all the billet slabs (usually four). When the cutting is complete, extinguish the gas cutter and release the brake to move the billet slab cutting device to the standby position.

Therefore, according to the present invention as described above, the cutting surface can be cut evenly and the cutting length can be accurately measured and the length can be cut when cutting the first cast head of the continuously cast billet slab or cutting the billet slab for sampling. It is possible to prevent burn accidents during measurement and to reduce the workload.

Claims (1)

A base (21, 21a) having a pair of wheels (2020a; 20b, 20c) installed at the bottom and connected to the frames (22, 22a) to form a support, respectively; Rails 26 and 26a fixed by blocks 25, 25a; 25b and 25c on rail bases 24 and 24a supported by supports 23, 23a; 23b and 23c provided in pairs on the upper surface of the base, respectively; Clamps mounted on the rails slidably mounted and mounted on the blocks 27, 27a; 27b, 27c connected to each other by rods 28, 28a and operated by air cylinders 31, 31a to hold the gas cutter ( 30); A worm gear (34) mounted on the base (32) on the side of the rail base (24, 24a) is operated to operate the spindle shaft (34) connected to the rod (28a) to move the clamps (30, 30a) on the rails (26, 26a). 33); A fixed arm 39 installed at the front of the slide block 27 and equipped with a gas cutter high pressure valve regulator 36 and a lever 37 at the front end thereof; Mounted on the base 42 of the side of the support 23b, the cylinder 43 with a built-in piston with air circulation holes, the permanent magnet 48 mounted at the end of the cylinder rod, and the cylinder rod over the range of movement of the cylinder rod A billet slab cutting device comprising: a billet slab length measuring mechanism (50) comprising a scale (46) mounted, a scale indicating rod (45) of the scale, and a guide (47).