JPH05749U - Steel piece charging device for heating furnace - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the productivity and reduce the heating cost by efficiently and accurately adjusting the position of the inclined steel slab that is transported for charging into the heating furnace. [Structure] A plurality of rams 4 arranged side by side in the forward-backward direction at right angles on a conveying roller table 3 in front of a heating furnace, a rack gear 6 coaxially integrated with each ram 4, and an engagement with the gears 6. Each ram 4 is equipped with a pinion gear 7
Steel for a heating furnace, which comprises a forward / backward drive device 5 for supporting the vertical swinging motion of the ram 4 and moving it forward and backward, and a swinging device 9 arranged below the rams 4 for vertically swinging the rams 4. A motor 14 is arranged in the single charging device, and the plurality of rams 4 are sandwiched between the rams 4, and the pushers 13 driven by the motors 14 and the respective motors prior to the charging operation of the respective rams 4 are driven. A control means 15 for driving the 14 and pushing the edge of the steel piece 1 on the conveying roller table 3 by each pusher 13 to correct the position is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a billet charging device that charges a billet in a heating furnace for reheating the billet in a hot rolling process, a thick plate process or the like while holding the billet in a correct position.

[0002]

[Prior Art]

 A typical prior art of this type of device is as shown in FIG. 3, in which a plurality of rams 4 arranged side by side in a forward-backward direction with respect to a conveyor 3 are provided. A rack gear 6 coaxially integrated with each ram 4 and a pinion gear 7 meshing with the gear 6 are provided, and a forward / backward drive device 5 that supports the rams 4 so as to be vertically swingable and moves forward and backward, It is arranged below each ram 4 and includes a swing device 9 for swinging each ram 4 up and down.

In the above apparatus, the charging method in which the steel slab 1 is scooped up simultaneously by the rams 4 and placed at an arbitrary position in the furnace is that the surface of the steel slab 1 is not flawed and the steel slab 1 is in the furnace. It is characterized by being able to shorten the time in the furnace and reduce the fuel consumption rate of the heating furnace by charging it all at once in the back of the furnace. In order to move, the ram 4 is provided with a stopper 16 in the form of a protrusion, and the stopper 16 is used to align and scoop up the position of the end surface of the steel slab 1 for charging into the furnace.

[0004]

[Problems to be solved by the device]

 By the way, there are various sizes of steel slabs 1 to be loaded into the heating furnace. With the above-mentioned equipment, the minimum width is required to load the ends with their end faces aligned. It is necessary to push the steel slabs 1 together with a stroke that can accommodate all of the maximum widths and then scoop them up at a predetermined position according to the furnace interior entry position. Push the steel slab 1 and return the ram 4 to scoop at the predetermined position. It has been pointed out that an additional operating time for this causes additional loss of time and heating source.

The object of the present invention is to attach a device capable of correcting the position and orientation of a steel piece to the steel piece charging device independently of each of the forward-backward movement and swinging devices. The aim is to make it possible to perform position correction efficiently and accurately by using the operating time of each device, improve productivity based on the reduction of rotime, and reduce heating cost.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the apparatus for charging steel billets for a heating furnace according to the present invention comprises a plurality of rams arranged in parallel with each other in a forward and backward direction on a conveying roller table in front of the heating furnace. Each ram is equipped with a rack gear provided coaxially and a pinion gear meshed with this gear, and a forward / backward drive device that supports each ram so that it can swing up and down, and a forward and backward drive, and a lower side of each ram. In a steel slab charging device for heating furnaces, which is arranged and swings each ram up and down, a motor drive that is arranged with a plurality of rams sandwiched between them in the forward and backward directions. Type pushers and control means for driving each motor prior to the charging operation of each ram and for pushing the edge of the steel piece on the transport roller table with each pusher to correct the position. .

[0007]

[Action]

 According to the present invention, the billet conveyed by the roller table often tilts in an oblique direction with respect to the traveling direction due to warping or slipping and stops in front of the charging device, whereas Within the operating time of lowering and advancing, the billet stopped in front of the charging device is straightened by pushing it with a pusher placed beside the ram with a stroke corresponding to the billet width. For example, it is possible to place a steel slab at an arbitrary position on the ram and load the steel slab at a predetermined position in the heating furnace with high accuracy without requiring an extra operating time.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a steel billet charging apparatus for a heating furnace according to the present invention, and FIG. 2 is a side view of FIG.

Reference numeral 2 denotes an inside of a heating furnace, and a conveying roller table 3 is provided in front of a billet charging port 2A of the heating furnace. The roller table 3 has a plurality of conveying rollers 3A at predetermined intervals. And the rotating shafts are arranged side by side at a right angle to the billet inlet 2A, and are rotated in the same direction by a drive device (not shown) at an equal circumferential speed, so that the billet 1 is placed on the conveyer roller 3A and is attached to the conveyer roller 3A axis. Convey it in the direction perpendicular to it.

A plurality of rams 4 (four rams in the illustrated example) are provided on the side opposite to the heating furnace with the transport roller table 3 as a reference, and the rams 4 extend in the longitudinal direction in the forward and backward direction directly to the transport roller table 3. Thus, the rams 4 are juxtaposed at equal intervals, and each ram 4 is connected with a forward / backward drive device 5.

The forward / backward drive unit 5 includes a rack gear 6 coaxially integrated with each ram 4 and a pinion gear 7 meshing with the gear 6, and each pinion gear 7 is rotationally driven by a drive motor 8. To be done. Further, the forward / backward drive device 5 is provided with a support roller 6A, which supports each ram 4 so as to be vertically swingable at a predetermined position by the support roller 6A, and a gap between adjacent transport rollers 3A of the transport roller table 3 is provided. The roller table 3 can be swung between an ascending position above and a descending position below.

On the other hand, on the lower side of the ram 4, a swinging device 9 including a hydraulic cylinder 10, a rod 11 and a lever 12 having a roller at an end thereof is arranged. Thus, the roller at the tip of the lever 12 is formed so as to move up and down through between the transport rollers 3A.

A plurality of rams 4 in the central portion, for example, two rams 4 are sandwiched between the rams 4, and pushers 13 are arranged on both sides of the ram 4 in such a manner that the forward / backward traveling direction is aligned with the forward / backward traveling direction of the ram 4. It is provided at a position where the tip of the steel slab 1 placed on the transport roller table 3 can be pressed by the tip and is connected to the motor 14, and the forward and reverse rotation of the motor 14 causes the transport roller table 3 to move. There are forwards and backwards that move forward across the road and backwards that return to the original position.

The control means 15 for driving the motor 14 to rotate forward and backward is a control circuit that automatically operates when the steel slab 1 reaches a predetermined position on the transport roller table 3, and the ram 4 rises and moves forward. Before the movement, each motor 14 is driven to move each pusher 13 forward so that the end edge of the steel piece 1 on the transport roller table 3 is pushed by a predetermined stroke.

The billet 1 often stops in an inclined state due to warpage or slippage between the transport roller 3A. In this state, the billet 1 is scooped up by the ram 4 and the forward / backward movement device 5 is used. When charged into the furnace, the steel slab 1 is placed on the skid in an inclined state.

Therefore, within the forward movement time before the steel slab 1 is placed on the ram 4, the pusher 13 pushes the steel slab 1 to correct the position and straightens the inclined steel slab 1 ′ as shown in FIG. If the steel slab 1 in this state is placed, then placed on the ram 4 and charged into the furnace, the steel slab can be charged accurately without loss of operating time.

[0017]

[Effect of the device]

 As described above, according to the billet charging apparatus for a heating furnace according to the present invention, the position of the tilted billet can be corrected by the pusher and the control means within the time before the ram starts the main operation. In addition, highly efficient heat treatment can be performed with high accuracy without loss time.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a steel billet charging device for a heating furnace according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a side view of a conventional steel billet charging device for a heating furnace.

[Explanation of symbols]

1,1 ': Steel piece 2: Inside heating furnace 2
A: Steel slab inlet of heating furnace 3: Transport roller table 3
A: Conveyor roller 4: Ram 5: Forward / backward drive device
6: Rack gear 6A: Support roller 7: Pinion gear
8: Drive motor 9: Oscillating device 10: Hydraulic cylinder 1
1: Rod 12: Lever 13: Pusher 1
4: Motor 15: Control means

Claims (1)

[Claims for utility model registration] Claims: 1. A plurality of rams arranged side by side in the forward-backward direction at right angles on a conveying roller table in front of a heating furnace, and a rack gear coaxially integrated with each ram. And a pinion gear meshing with this gear, and a forward-backward drive device that supports each ram so that it can swing up and down and moves forward and backward. In a steel billet charging device for a heating furnace equipped with a moving device, a motor-driven pusher that is arranged with a plurality of rams sandwiched between the rams in the forward and backward directions, and a charging operation of each ram. Prior to the above, there is provided control means for driving each motor so that each pusher pushes the end edge of the steel piece on the conveying roller table to correct the position, and a steel piece charging apparatus for a heating furnace.