JPH0387311A - Device for charging steel slab into heating furnace - Google Patents

Abstract

PURPOSE:To simply and quickly correct posture of a steel slab only with advance and retreat of a rod by setting a stopper composed of a cylinder and rod on rams withdrawn from tip parts of plural pieces of the rams crossing orthogonally with a roller table in front of a heating furnace. CONSTITUTION:The steel slab 6 is sent on the roller table 2 and at the time of stopping this in front of the heating furnace 1, by working shaking device 16, the tip part of ram 8 is held upward through the roller 24 to hold up the steel slab 6 from the roller table 2. Successively, the rod 28a is extended with a cylinder 28 for the stopper 30 and the tip parts of plural pieces of rods 28a are abutted on the steel slab 6 to correct the posture, and the rams 8 are advanced through rack gear 9 by rotating a pinion gear 11 to send the steel slab into the heating furnace 1. Successively, the tip parts of rams 8 are descended by working the shaking device 16, and the steel strip 6 is laid on the prescribed position in the heating furnace 1 and the rams 8 are retreated to the original position by rotating the pinion gear 11. By this method, the posture of steel slab 6 is easily and quickly corrected and can be charged in the heating furnace 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for charging steel billets into a heating furnace.

[Conventional technology]

For example, a steel billet manufactured using a continuous casting machine or the like and having a predetermined length and width is sent to a heating furnace for various heat treatments.

This steel billet is fed on a roller table to just before the heating furnace, and then stopped, at which point a billet charging device is provided.

This billet charging device consists of multiple arms called rams, and these rams rise from below the rollers between the rollers, support the billets that have been fed, lift them off the roller table, and hold them as they are. The structure is such that it is charged into the heating furnace in this state.

The ram constituting this billet charging device has a structure that allows it to move back and forth and to swing slightly up and down in order to separate the billet from the roller table.

To do this, conventionally, a rack gear is formed on the lower surface of the ram in the middle, and a pinion gear that meshes with this rack gear moves the ram back and forth, and a guide roller is provided on the upper side of the ram in correspondence with the rack gear. The ram is held in a clamped state, and the ram is made to be able to swing up and down using the clamped portion as a fulcrum by a cylinder or other device provided at the tip end of the ram.

Various billet charging devices having such a structure are known.

[Problem to be solved by the invention]

However, the conventional billet charging apparatus has the following problems that must be solved.

That is, the steel billet conveyed on the roller table is not necessarily sent parallel to the roller table, but may be fed bent in a state intersecting the axial direction of the roller table.

In such a case, if the steel slabs are supported by multiple rams and fed into the heating furnace, the steel slabs will be fed into the heating furnace in a bent state. It will no longer be possible to place it in

Therefore, in the past, for example,
As stated in the publication, a positioning metal fitting is fixed to the tip of the ram, and as the ram moves forward, the positioning metal fitting is brought into contact with the steel piece, and the posture of the steel piece is corrected. I'm about to send it into the heating furnace.

However, with a structure in which a positioning metal fitting is protruded from the tip of the ram, the part of the ram that protrudes in front of the steel piece is long when the positioning metal fitting is in contact with the steel piece, so the steel piece cannot be placed in the heating furnace. If the desired relatively narrow spacing is maintained, the tip of the ram will hit the previous billet in the furnace, making it impossible to charge the billets into the furnace one after the other.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and its purpose is to enable the correct positioning of steel pieces and feed them into a heating furnace, and to
To provide a device for loading and unloading steel slabs that can freely set the interval between steel slabs in a heating furnace to be narrow or wide.

[Means to solve the problem]

In order to solve these problems, the present invention includes a plurality of rams arranged perpendicular to the roller table in front of the heating furnace, and a rack gear that supports the rams so that they can move forward and backward and swing freely. In a device for charging steel billets into a heating furnace, the device is equipped with a pinion gear, a guide roller provided on the upper side of the ram facing the pinion gear, and a ram rocking device placed on the lower side of the tip of the ram. , a stopper consisting of a cylinder and a rod facing the heating furnace side is arranged in the axial direction of the upper surface of each ram retracted from the tip of the ram, and the posture of the steel billet can be corrected by advancing the rod. did.

[For production]

When the steel billet to be fed into the heating furnace is fed on the roller table, the rollers stop rotating, and the steel billet stops at a predetermined position, the swinging device is activated and the rotation lever is rotated counterclockwise. Ru. Then, the tip of the ram is lifted upward with the steel piece placed on it via the roller, and then pressure oil is introduced into the cylinder of the stopper to move the rod forward, causing the piece of steel to meet the tips of multiple rods. It comes into contact with the roller table, and its posture is corrected to be parallel to the roller table. In this way, with the steel billet lifted, the ram is advanced through the rack gear by rotating the pinion gear and fed into the heating furnace.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 to 4 illustrate one embodiment of the present invention,
In the figure, the symbol l indicates a heating furnace, and this heating furnace 1
A roller table 2 is arranged along the entrance side of the entrance.

The roller table 2 includes a large number of rollers 3 at predetermined intervals,
These rollers 3 are rotated by a motor 4 via a shaft 5 in groups of a plurality of rollers. A steel piece 6 is guided onto this roller table 2.

By the way, on the opposite side of the heating furnace 1 with the roller table 2 in between, a billet charging device 7 is arranged.

The billet charging device 7 has a plurality of long rams 8, and these rams 8 are arranged perpendicular to the roller table 2.

A rack gear 9 is formed over a predetermined range on the lower surface of the rear side of the ram 8, and a pinion gear 11 attached to a support frame 10 provided on the base side in the middle of the ram 8 in the longitudinal direction meshes with the rack gear 9. are doing.

Further, a guide roller 12 is arranged above the ram 8 at a position facing the pinion gear 11, and when the ram 8 is in a horizontal state as shown in FIG. are in contact with each other. pinion gear 1
1 is fixed to a common shaft 13 disposed orthogonally to the ram 8, as shown in FIG.
It is rotated by a motor 15 via.

By the way, the arrangement relationship between the pinion gear 11 and the guide roller 12 is that they are not on the same vertical line, but as shown in FIG. It is in a state of being tilted by a predetermined angle θ, which is the same as the vertical swing angle.

If such an arrangement is adopted, even when the ram 8 is swung as described later, the ram 8 will not be strongly held between the pinion gear 11 and the guide roller 12, and will oscillate smoothly. be able to.

As shown by the symbol P in FIG. 3, the ram 8 has a cross-sectional shape that is not rectangular but has an arcuate upper end.

If the upper end is made into an arcuate surface in this way, when the steel piece 6 and the ram 8 come into contact, it will be a line contact, so even if the ram 8 is slid against the steel piece 6, the steel piece 6 will not be damaged. There is no.

On the other hand, a swinging device 16 for the ram 8 is arranged below the tip side of the billet charging device.

The swing device 16 has a motor 17 and a speed reducer 18, and a disk 19 is fixed to the output shaft of the speed reducer 18. One end of a lever 20 is rotatably connected to this disk 19 at an eccentric position, and the other end of the lever 20 is attached to a shaft 21 connected to a support frame 21 fixed near the roller table 2.
It is rotatably connected to the lower end of a letter-shaped rotary lever 23, which is rotatably supported midway through the lever 23.

A roller 24 is rotatably supported on the upper end of the rotary lever 23, and this roller 24 is in contact with the lower surface of the ram 8.

A stopper 30 consisting of a cylinder 28 and a rod 28a is fixed on each ram 8 at a position slightly retracted from the tip of the ram 8, and the rod 28a
The tip of a extends toward the heating furnace l side.

If such a structure is adopted, the rod 28a is contracted before starting the charging operation of the steel billet, and after the steel billet 6 is supported by the tip of the ram 8 and separated from the roller table 2, the rod 28a is When the steel piece 6 is extended a predetermined distance, its attitude is corrected by the tip of the rod 28a as shown by the chain line in FIG. In addition, the cylinder 2 on each ram 8
8 to extend each rod 28a to correct the posture of the steel piece 6, all the rods 28a may be moved forward in the same state, or they may be moved forward in different states as shown in FIG. You can also move forward. However, in any case, when all the rods 28a extend to the previously set forward limit, the steel piece 6 is in the correct position as shown by the two-dot chain line in FIG.

Next, the operation of this embodiment configured as above will be explained.

First, before the billet 6 is sent over the roller table 2, all the rams 8 of the billet charging device 7 are connected to the rollers 3 of the roller table 2, as shown by two-dot chain lines in FIG.
It is located below the upper surface of the roller table 2 in between.

In this state, the steel billet 6 to be fed into the heating furnace 1 is sent over the roller table 2, the roller 3 stops rotating, and when the steel billet 6 is stopped on a predetermined plate, the swinging device 16 is activated and rotates. The lever 23 is rotated counterclockwise in FIG. Then, the tip of the ram 8 is lifted upward via the roller 24, and the ram 8 is rotated clockwise in FIG. 2 using the pinion gear 11 as a fulcrum. The piece 6 is lifted off the roller table 2 while being supported by the tip of the ram 8.

Subsequently, when pressure oil is supplied to the piston head side of the cylinder 2, the rod 28a is extended, and the rod 28a is bent and fed to the side edge of the billet 6 on the opposite side of the heating furnace, as shown by the solid line in FIG. The arriving steel piece 6 comes into contact with the tips of the plurality of rods 28a as shown by the chain lines, and its posture is corrected to be parallel to the roller table 2.

In addition, when operating the cylinders 28 on each ram 8 to extend each rod 28a and correct the posture of the steel piece 6, all the rods 28a may be moved forward in the same state, or as shown in FIG. Alternatively, the robot may be moved forward in different forward states. However, in any case, when all the rods 28a extend to the previously set forward limit, the steel piece 6 is in the correct position as shown by the two-dot chain line in FIG. The amount of advance of the rod 28a at this time is as shown in FIG.
If the distance from the tip of the ram 8 to the retraction limit of the rod 28a is calculated, and the width of the Li4 piece 6 is S, then the distance is (L-3).

In this way, the rod 28a is stopped after moving forward by (L-3). At this time, the tip end surface of the ram 8 and the tip end surface of the steel piece 6 are in a state of being in agreement. Note that the distance is determined automatically when designing the device, and the width S of the steel slab 6 is obtained by measuring in advance, and this difference can be easily calculated and commanded by a computer. can.

Furthermore, even if slippage occurs between the ram 8 and the steel piece 6 due to the advancement of the rod 28a, since the upper surface of the ram 8 has a semicircular cross section, the contact area is extremely small and the steel piece 6 will not be damaged. .

Next, with the steel piece 6 lifted, the ram 8 is moved forward via the rack gear 9 by rotating the pinion gear 11 and sent into the heating furnace 1.

When the steel billet 6 is fed into a predetermined position in the heating furnace l, the swinging device 16 is activated, the rotation lever 23 is rotated clockwise in FIG. 2, and the tip of the ram 8 is lowered a predetermined distance. Then, the steel slab 6 is placed at a predetermined position in the heating furnace l.

At this time, since the tip surface of the ram 8 and the tip surface of the steel billet 6 are aligned, even if the distance between the steel billets 6 in the heating furnace 1- is narrow, the tip of the ram 8 has already been charged. It does not hit the steel piece 6 that was being held, and there is no problem.

Subsequently, the pinion gear 11 is rotated and the ram 8 is moved backward. Then, it returns to the initial standby position.

By repeating such operations, the steel pieces are sequentially fed into the heating furnace 1.

Since this embodiment is configured as described above, it is possible to correct the posture of the steel billet and reliably feed it into the heating furnace.
Moreover, even if the spacing between the steel slabs in the heating furnace is narrow, it can be made as desired.

Note that the pinion gear 11 and the guide roller 12 disposed opposite thereto do not directly face each other, and the pinion gear 12 located on the upper side is disposed with a slight shift toward the rear of the ram. and guide roller 1
There is no problem between the two, and no unstable operation occurs.

Further, since the upper surface of the ram that supports the steel piece is an arcuate surface, only a line contact is made with the steel piece, and the steel piece is not damaged.

In the above-mentioned embodiment, the case where the steel billet is fed into the heating furnace has been explained, but if a steel billet take-out device with a similar structure is provided on the discharge side of the heating furnace 1, the steel billet can be removed from the heating furnace. Pieces can be easily removed.

In this embodiment, when the ram 8 is retreated, the tip end surface of the ram 8 is made to protrude slightly in front of the tip end surfaces of the steel pieces 6 within a range smaller than the spacing between the copper pieces 6 in the heating furnace. Even though
There is no problem.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the stopper is fixedly disposed on the upper surface of the ram recessed from the tip of the ram, so that the posture of the steel billet can be easily changed by simply moving the rod back and forth. and can be corrected quickly.

In addition, in the back and forth movement of the ram, the arrangement relationship between the pinion gear, which is the fulcrum that rotatably supports it, and the guide roller,
The upper guide roller is positioned closer to the rear end of the ram than the pinion gear, so even if the ram swings, no unreasonable force is applied, resulting in an extremely simple structure. This allows the ram to move back and forth and swing smoothly.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of the present invention.
2 is a front view, FIG. 3 is a front view showing the operating state of the ram, and FIG. 4 is a plan view showing the operating state of the stopper on the ram. ■... Heating furnace, 2... Roller table, 3... Roller, 6... Steel billet, 7... Charging device, 8... Ram, 9... Rack gear, 11...・Pinion gear, 12
, 32.33... Guide roller, 16... Rocking device, 23... Rotating lever 28... Cylinder, 28a...
・Rod, 30...stopper.

Claims (1)

[Claims] A plurality of rams are arranged perpendicular to the roller table in front of the heating furnace, a pinion gear supports the rams so that they can move back and forth and swing freely via rack gears, and a pinion gear is installed above the rams facing the pinion gears. In a device for charging steel billets into a heating furnace, which is equipped with a guide roller and a ram rocking device disposed below the tip of the ram, the axial direction of the top surface of each ram retracted from the tip of the ram is A stopper consisting of a cylinder and a rod facing the heating furnace side is arranged respectively in the steel billet, and the billet is placed in a position such that the posture of the billet can be corrected by advancing the rod. Charging device.