JPS6156813A - Deburring device for slab cut through welding - Google Patents

Abstract

PURPOSE:To deburr a slab cut through welding easily and reliably by constructing such that the lower cutter will move gradually while point contacting with the burr. CONSTITUTION:In deburring device to be arranged in welding line for cutting a continuously casted material into slabs of predetermined length, the upper cutter 12 in upper cutter mechanism 1 is normally at the lift position hihger than the bus line level of roller table R while lowered to said level when deburring. The lower cutter 35 is fixed while inclining in lateral direction of slab. A differential transfer is fixed between horizontally movable table 32 and lower cutter holder 34 to detect relative moving distance. The lower cutter mechanism 3 is normally at the lowering position lower than said level and lifts to said level when deburring then moves horizontally. Consequently, it is deburred easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a burr removal device for melt-cut slabs that is installed in a melt-cut line that cuts continuous cast slabs into slabs of a predetermined length. be.

(B) Prior Art A gas torch/cutter is generally used for cutting slabs, but in this method, a large amount of burrs are generated particularly on the lower surface of the slab during fusing and adhere to the ends of the slab. This welding burr must be removed because it causes defects in the product in the subsequent rolling process.

Conventionally, this fusing burr has been removed by once cooling the slab outside the continuous casting machine and then manually grinding it off with a grinder, by removing it with a scarf ink machine, etc., or by removing it between the conveyor and rollers of the continuous casting machine. There are two methods: removing it by gas melting or mechanically removing it between the same conveyor and rollers.

This mechanical removal method includes a method of directly scraping off the burr, a method of hammering it with a chain or the like, a method of removing it with a shear, and the like. In a continuous casting machine, considering the slab conveyance cycle time and other conditions, removal using a shear is considered to be the most suitable method. By the way, in conventional equipment that uses a shear to remove fusing burrs, the blade that deburrs the lower front end of the slab and the blade that deburrs the lower rear end of the slab are either separate or held in one blade. attached to the table. However, since the double-edged tool only scratches the bottom surface of the slab horizontally, it only deforms the hanging burr horizontally, but it remains attached to the slab, and it is not possible to completely cut the burr from the slab. could not.

Therefore, various devices have been proposed that can reliably remove burrs. Among them, typical examples similar to the apparatus of the present invention will be briefly described below.

First, as one example, Japanese Utility Model Application Publication No. 56-60568 discloses a burr removal device in which a cutter for removing burrs is divided into multiple parts in the slab width direction, and each cutter can be moved up and down and tilted. Disclosed.

When this device raises a plurality of cutters and presses them against the slab, if the time required for the two cylinders to rise is not constant, the cutter will rise tilted and the slab may be scratched at the corner of the cutter. This adjustment is extremely difficult, and even once adjusted, it can quickly go awry due to changes in the coefficient of friction, intrusion of dirt, etc. In addition, taking into consideration that there may be a time delay until all the blades finish rising due to differences in the rising speed of each blade, the time required for starting the horizontal movement of the blade after issuing the signal to press the blade against the slab is taken into consideration. If sufficient time is not allowed for this, there may be areas where burrs cannot be removed. Furthermore, if the blade is warped beyond the full upward stroke, there is a drawback that burrs cannot be removed from the slab. In addition,
Since this device has a complex structure and requires a high degree of machining, it is necessarily expensive and it is difficult to operate smoothly without incurring sufficient maintenance costs. The difference between the device of the present invention and this device is that if the burr cannot be removed for some reason, the burr remains as it is because there is no upper blade, and the burr remains as it is, and the burr is removed from the slab. At the same time, since there is no device to push down the deburr to a fixed position, it is not possible to sufficiently remove the burr from a slab that is deformed and warped in the upward direction, and there is a possibility that the slab may move during burr removal.

Furthermore, as another representative example, as disclosed in Japanese Utility Model Application Publication No. 58-8523, this burr removing device is provided with cutters at both upper corners of the front and rear surfaces of the canter holding member, and the line A cutter holding member placed at one location is provided so that it can move up and down and back and forth, and a slab stopping device is provided that stops the front end and rear end of the slab respectively above the cutter holding member, so that one cutter moves upward and forward. The cutter is configured to deburr the lower part of the front end of the slab, and deburr the lower part of the rear end of the slab by raising and retracting the other cutter.

Since this device uses one blade to remove burrs from the front and rear ends of the slab, the horizontal movement stroke of the blade is almost as large as that of a normal deburring device. Therefore, it is necessary to increase the distance between the table and rollers before and after the space in which the cutter moves horizontally.

Slab cutting machines in recent continuous casting equipment cut the slab to the length required by the downstream rolling equipment without cooling it to near room temperature, and then feed it directly into the heating furnace. It's coming. Therefore, slab cutting machines inevitably tend to cut short slabs, and the distance between the table and rollers after the cutting machine has been reduced to prevent short slabs from falling. This device has the disadvantage that it imposes special restrictions on the shortest slab size that can be cut for burr removal. In addition, with this device, the blade reciprocates with a long stroke to remove burrs, so the components of the device straddle the table and rollers, making it difficult to remove the burr collection box as there is no space to pull it out of the machine. It is.

The difference from the device of the present invention is that it does not have an upper blade;
Also, the blade does not have the ability to bend around the pin joint and follow the bulge in the width direction of the slab, which limits the success rate of removing burrs.

In recent years, continuous casting machines have been linked to rolling mills to supply high-temperature slabs to rolling mills, but in order to eliminate the need for personnel to remove and maintain residual burrs and to prevent the slab temperature from dropping, burr removal equipment is not required. , a 100% deburring success rate is required.

(Problem to be solved by the blade invention The problem to be solved by the present invention is to obtain a device that can easily and reliably remove burrs from a melt-cut slab.

(Means for Solving the Problems of the Invention) The fusion-cut slab burr removal device of the present invention is installed at the rear of the fusion-cutting line where continuously cast slabs are fused into slabs of a predetermined length. The upper blade mechanism is located at an elevated position above the pass line level and lowers to this level when removing burrs, the clamp mechanism presses the welded slab to fix the position during burr removal, and the lower blade is raised above the pass line level under normal conditions. (a lower blade mechanism that is in a lowered position below the level and that rises to the level and moves horizontally when removing burrs; and a lower blade mechanism that is removed from the welded slab)
The above-mentioned problem is solved by a mechanism of the burr catcher that receives the removed burrs.

(E) Function In the device of the present invention, when removing burrs, the lower blade mechanism moves the lower blade upward and horizontally to first scrape off the burrs from the slab, and then lift up any burrs that are still attached to the slab. It is caught between the blade and the lower blade and is torn. This completely removes the burr from the bottom end of the slab. The removed burrs are received by a burr receiver mechanism and transported to a burr collection site outside the line.

(F) Embodiments Next, embodiments of the apparatus of the present invention will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, the device of the present invention includes an upper blade mechanism 1, a clamp mechanism 2, and a lower blade mechanism 3.
, the burr catcher is made up of a mechanism 4.

As shown in FIG. 1, in the embodiment of the present invention, from the viewpoint of improving work efficiency, an upper blade mechanism 1 and a burr receiver are used to simultaneously remove the rear end burr of the preceding slab and the leading end burr of the trailing slab. are provided in plane symmetry with respect to the slab advancing direction with the mechanism 4 as the center. Therefore, for convenience of explanation, one set of mechanisms will be described below.

However, it will be clear from the following description that burrs on the slab can be sufficiently removed with only one set.

The upper blade mechanism 1 includes an upper blade 12 attached to the front and back of the bottom of the upper blade holder 11, and a fluid pressure cylinder 13 that connects the upper blade holder 11 with the upper blade 12.
It is configured so that it can be raised and lowered.

In the upper blade mechanism 1, the upper blade 12 is in a raised position above the pass line level of the roller table (the position indicated by the two-dot chain line in Fig. 1) during normal operation, and when removing burrs, the upper blade 12 is at the raised position above the pass line level of the roller table. and the position indicated by the solid line in FIG. 2].

The clamp mechanism 2 connects the clamp 21 to a fluid pressure cylinder 22.
It is configured to operate. The clamp mechanism 2 is in standby above during normal operation, and the clamp 21 is in standby when removing burrs.
presses the slab S and fixes its position.

The lower blade mechanism 3 includes a horizontal fluid pressure cylinder 31 and a horizontal moving table 3.
2 and vertical fluid pressure cylinder 3 to the horizontal moving table 32.
3 is attached to the cylinder, a lower blade holder 34 is attached to the cylinder so as to be able to slide up and down, and an upper blade 35 is fixed to the holder 34.

The horizontal moving table 32 rotatably supports wheels 321, as shown in FIG.
61 is fitted. The lower blade holder 34 has a similar configuration and is attached to the horizontal moving table 32 so as to be slidable up and down. That is, a wheel 341 is rotatably attached to the lower blade holder 34 and fits into a groove 321 provided in the horizontal moving table 32.

The lower blade holder 34 is divided into two parts, as best shown in FIGS. 4 and 6, and includes a connecting plate 342 and a pin 34.
They are swingably connected by a bottle joint 344 consisting of 3. The reason will be explained later.

For reasons that will be described later, the lower blade 35 is installed obliquely in the slab width direction, as shown in FIG.

A differential transformer 37 (Fig. I4) is installed between the horizontal moving table 32 and the lower blade holder 34, and detects the relative movement distance between the two.

The lower blade mechanism 3 configured as described above operates as the lower blade 3 during normal operation.
5 is in the lowered position below the cross line level of the roller table R (located in the left group in Figure 1), and when removing burrs, it rises to this level and moves horizontally (
(the set on the right in Figure 1).

The burr receiving mechanism 4 is provided directly below the upper blade mechanism 1, receives burrs removed from the melt-cut slab S, and transports them to a burr collection site. The mechanism 4 for the burr catcher is the chute 41 and the trolley 4.
2, the burr is guided to the cart 42 by a seat 41. The trolley 42 receives the debris and transports it to the burr collection site.

Next, the operation of the apparatus of the present invention will be explained.

In FIG. 1, a slab cast by a continuous casting machine passes through a group of vinyl rolls and straightening rolls, is cut into a predetermined length by gas cutting, and is sent as a slab S. First, the slab S sent by the roller table R
is stopped slightly in front of the upper blade holder 11 using a phototube (not shown), etc. Next, the upper blade holder 11 is attached to the upper surface of the roller table R by approximately 50 to 100 mm.
Lower it to a position of about 6. The upper blade holder 11 is moved up and down by a fluid pressure cylinder 13 as shown in FIG.

The roller table R is driven to advance the slab S again and bring it into contact with the upper blade holder 11. The shock of the collision at this time is absorbed by a buffer 14 attached to the upper blade holder 11 as shown in FIG.

Next, the fluid pressure cylinder 22 installed in the clamp mechanism 2
The clamp 21 fixes the slab S so that it does not move during the removal operation.

After the preparation for the burr removal work is completed in this way, the horizontal fluid pressure cylinder 31 of the lower blade mechanism 3 is operated to press the lower blade 35 against the lower surface of the slab S. At this time, as shown in FIG. 4, the upward stroke of the vertical fluid pressure cylinder 33 from when the lower blade 35 rises by the differential transformer 37 until it contacts the lower surface of the slab S, that is, the position of the lower surface of the slab, is memorized. let

The upper blade holder 11, which is stopped approximately 50 to 100 degrees above the upper surface of the roller table R, is lowered by the fluid pressure cylinder 13 to align the upper blade 12 with the deburring position. At this time, as shown in Figure 7 (4), the lower surface of the slab and the upper blade 1
3. Secure the gap d with 3.

This gap d is provided to prevent interference between the upper blade 12 and the lower blade 35 when the slab S is warped in the width direction, and is preferably in the range of about 5 to 10 wn.

Finally, the horizontal fluid pressure cylinder 31 of the lower blade mechanism 3 shown in FIG. Remove while watching.

As shown in FIG. 6, it is preferable that the lower blade 12 is divided into two parts from the center, and each lug 35 is swingably attached to the lower blade holder 11 by a pin joint 344. With this configuration, even if the slab S is warped in the width direction,
This is to allow the lower blade 35 to come into close contact with the lower surface of the slab S.

Further, it is preferable that the lower blade 35 is installed so as to be slightly inclined with respect to the width direction of the slab S, as shown in FIG. With this configuration, the lower blade 35 makes point contact with the burr and moves gradually, making it easier to remove the burr smoothly.

The scraped off burrs fall onto a trolley 42 through a chute 41 installed in the burr catcher mechanism 4. Once a certain amount of burrs have accumulated, the truck 42 moves to dispose of the burrs in a burr dump (not shown).

(g) Effect The effects of the invention are listed below.

(1) Since the upper blade 12, which moves vertically, and the lower blade 35, which moves horizontally, scrape off burrs while sandwiching them, burrs are reliably removed.

(2) The upper blade 12 is the holder 1 that acts as a stopper for the slab.
1, it becomes unnecessary to install the upper blade and the stopper separately, and the equipment cost is also reduced.

(3) Since it is composed of two lower blade mechanisms 3 and one upper blade mechanism 1, it is possible to deburr the rear end of the leading slab and the front end of the trailing slab in succession. .

(4) The burr transport trolley can be pulled out from the roller table at right angles by electric traction or cylinders, etc.
It can be easily carried off the line.

[Brief explanation of the drawing]

FIG. 1 is a side view of the device of the invention. Figure 2 shows H- in Figure 1.
■Partial front view seen from the line. Figure 3 shows III-I in Figure 2.
Partial plan view seen from the line. FIG. 4 is a partial front view taken from line IV-IV in FIG. 1. FIG. 5 is a plan view taken along line V-V in FIG. 4. Figure 6 shows 11 in Figure 5: Upper blade holder
12: Upper blade 13: Fluid pressure cylinder 2: Clamp mechanism 21: Clamp 22: Fluid pressure cylinder 3: Lower blade mechanism il 31: Horizontal fluid pressure cylinder 32: Horizontal moving table 33: Vertical fluid pressure cylinder 34: Lower blade holder 35 : Lower blade 36: Support stand 37: Differential transformer 4:
The burr catcher is mechanism 41: Chute 42: Cart (5 people outside)

Claims (1)

[Claims] At the rear of the cutting line where continuously cast slabs are cut into slabs of a predetermined length, the upper blade is normally at an elevated position above the pass line level of the roller table, and is lowered to this level when removing burrs. An upper blade mechanism that
A clamp mechanism that presses the welded slab to fix its position when removing burrs, and a lower blade mechanism that normally has a lower blade in a lowered position below the level, and when removing burrs, raises to the level and moves horizontally. , a burr removal device for a melt-cut slab, comprising a burr receiving mechanism that receives burrs removed from the melt-cut slab.