TWI385066B - Kicker structure of high speed flying shear in wire rod mill - Google Patents

Description

Kick plate structure of high speed wire end cutting machine

The invention relates to a kick plate structure of a high-speed end-cutting machine, in particular to a kick plate structure of a high-speed end-cutting machine used in a hot rolling process of steel.

Figure 1 shows a conventional steel hot-rolling end-cutting machine (100). In the hot rolling process of steel, the crude steel embryo is cast from the iron sand raw material and is sent to the rolling mill after heating to the recrystallization temperature. Rolling. When the hot rolled steel is transferred from the conveying path to the end cutting machine (100), the end cutting end or the leading end can be controlled by the left and right movement of the conveying path (1). The end-cutting end mainly cuts the length of the hot-rolled steel head end (5) by the cutter of the end-cutting machine (4) and falls into the waste guide groove (3), and then the lower kick plate (8) The subsequent hot rolled steel (7) is kicked to the conveying guide (2) to the finishing mill, and the tail section (9) of the hot rolled steel is cut by the cutter (4) and kicked by the upper kicking plate (6). Waste guide groove (3). Since the ends of the steel passing through the roughing mill collide and rub against the equipment during traveling, it is easy to cause slag or deformation of the steel, which causes the slag slag crushing or abnormal quality of the finishing mill of the subsequent process. In addition, the ends of the head and the tail are also relatively low temperature points of the whole steel. In order to ensure the production quality, before entering the finishing mill, the end of the head and tail should be cut by the end cutting machine. And at high yield requirements, it is necessary to reduce the amount of cuts at both ends of the head and tail as much as possible to reduce waste generation and improve efficiency. However, if the scrap steel to be cut is too short, it is easy for the scrap steel to bounce through the kick plate, which affects the progress of the subsequent steel and causes the plug. Therefore, how to properly reduce the amount of cuts at both ends of the head and tail, and maintain process stability is an important issue.

Figure 2 shows a front view of a conventional end-cutting machine kick plate structure. The upper and lower kick plates of the conventional end-cutting machine are symmetrical kick plates (10), and the problem of this design occurs when the portion to be cut of the tail end (9) of the hot-rolled steel material needs to be shortened to a certain length. Because the length of the upper kick plate is designed to kick a certain length of the tail end waste to the waste guide groove (3), when the tail end (9) of the hot rolled steel cut by the cutter is too short, the upper kick is long. The length of the plate will cause the tail end (9) of the too short hot-rolled steel to be subjected to a downward unbalanced thrust. This force acts on the rear end of the center of gravity of the steel so that the front end of the steel bounces. Predicting the direction in which it may travel, may be kicked into the conveying guide groove (2), so as to affect the subsequent finishing rolling operation, and it is easy to crush the slag of the finishing mill; it is also possible that the end of the hot rolled steel (9) is not kicked. To the waste guide trough (3), leaving the station at the end of the process station to cause the end of the cutting machine to stop the material, the entire production line needs to be shut down for maintenance, which takes time and labor costs. Therefore, how to improve the structure of the kick plate can appropriately reduce the amount of cuts at both ends of the head and tail, and maintain the stability of the process, which is an important issue in the hot rolling process of steel.

The object of the present invention is to provide a kick plate structure of a high-speed end-cutting machine to reduce the cut scrap steel and stabilize the end cutting mechanism.

In order to achieve the above object, the present invention designs the shape of the upper kick plate and the lower kick plate to be asymmetrical, wherein the length of the upper kick plate is smaller than the length of the lower kick plate, but the upper kick plate and the lower kick plate have the same arc shape, as shown in FIG. And the four end cutting machine kick board structure is shown. Under the prior art kick plate length design, the end length of the steel end which can stabilize the end cut is about 90 cm, but the invention can shorten the length of the upper kick plate by about one-half. The cut length is reduced to about 60 cm, which can reduce about 30% of the scrap material to achieve energy saving and environmental protection. It should be noted that the kicking plate (15) of the present invention needs to be able to be kicked before the shortened center of the steel tail (24), that is, the length of the upper kick plate (15) is less than the length of the shortened steel tail (24). One of them is to ensure that the steel tail (24) does not bounce, thereby reducing the cut scrap steel and stabilizing the end cutting mechanism.

Referring to Figure 3, there is shown a steel hot-rolling end-cutting machine (300) of the present invention, and a process schematic thereof. The end cutting machine of the present invention comprises an upper rotating shaft (11), a lower rotating shaft (12), a rotating arm (13) connected to the upper rotating shaft, and a rotating arm (14) connected to the lower rotating shaft. a kicking plate (15) above the front end of the upper arm, a kicking plate (16) below the front end of the lower cantilever, and a cutter (17) between the upper and lower arms, and a rear end of the end cutting machine (300) There is a guide channel (18) for receiving the end-cut hot-rolled steel strip and a waste guide groove (19) for receiving the scrap steel strip, and a conveyor lane (20) is arranged in front of the end-cutting machine (300). The steel (21) passing through the roughing mill is sent to the front of the end cutting machine by the conveying path (20), and the conveying path (20) can control the forward direction of the steel material (21) to the left side or the right side to determine the steel end. Cut the end or the end. When the hot-rolled steel tip end (22) to be cut passes through the cutter (17), it is cut off and dropped into the waste guide groove (19), and the hot-rolled steel middle section (23) is kicked by the lower kick plate (16). To the rear guide groove (18), when the hot rolled steel tail (24) to be cut passes through the cutter (17), it is cut and dropped into the waste guide groove (19).

Referring to Figures 1 and 2, the structure of the kicking plate (6) and the lower kicking plate (8) above the kicker of the end-cutting machine is a symmetrical kick plate (10), and the length design is about 43 cm. When the length of the steel tail (9) to be cut is shortened to about 90 cm, since the upper kick plate (6) can be kicked before the center of gravity of the steel tail (9), the steel tail (9) can be kicked down to the waste guide. (3); However, when the length of the steel tail (9) to be cut is shortened to about 90 cm or less, for example, 60 cm, the upper kick plate (6) will be kicked to the center of the steel tail (9), which will cause the steel tail ( 9) The phenomenon of bouncing at the front end. After the steel bounces, it is impossible to fully predict the direction in which it may travel. It may be kicked into the conveying guide groove, which may affect the subsequent finishing rolling operation, and the crushing of the finishing mill may be easily broken. It may also be that the end of the hot rolled steel is not Kicking into the waste guide slot and staying in the process station will cause the local cutting machine station to be stuffed, and the entire production line needs to be shut down for maintenance, which takes time and labor costs.

Referring to FIG. 3 and FIG. 4 again, the kick plate (15) of the present invention and the kick plate (16) of the present invention are designed as an asymmetrical kick plate (25), and the upper kick plate (15) is less than the length. The length of the lower kick plate (16), but the upper kick plate (15) is the same as the lower kick plate (16), thereby maintaining the arc surface of the kick plate in contact with the steel. Under the design of the kick plate length of the prior art, the end of the steel with stable process can be end cut to a length of about 90 cm. The invention shortens the length of the upper kick plate, and can reduce the end cut length of the steel end to save waste. It should be noted that the kick plate (15) of the present invention still needs to be able to be kicked before the shortened steel tail (24) center of gravity, that is, the length of the upper kick plate (15) needs to be less than the length of the shortened steel tail (24). One of them is to ensure that the steel tail (24) does not bounce.

According to the embodiment of the present invention, when the length of the upper kick plate (15) is about 23 cm, the length of the steel tail portion (24) to be cut can be shortened to about 60 cm, and the kick plate (15) of the present invention still kicks the steel. Before the center of gravity of the tail (24), the steel tail (24) does not bounce, thus saving 30% of the waste. When considering the need for hot-rolled steel (不同=19.5mm~ψ=22.5mm) suitable for different pipe diameters, too short kick length will make the hot-rolled steel of smaller pipe diameter too large, so it is also This will reduce the stability of the process, so the shorter the design of the kick plate (15) length can not achieve the purpose of stable process.

While the present invention has been described in its preferred embodiments, it is not intended to limit the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Conventional end cutting machine

1. . . Conveyor

2. . . Conveyor guide

3. . . Waste guide

4. . . End cutting machine cutter

5. . . Head of hot rolled steel

6. . . Kick board

7. . . Hot rolled steel

8. . . Lower kick board

9. . . Tail section of hot rolled steel

10. . . Symmetrical kick board

300. . . Improved end cutting machine

11. . . Upper rotation axis

12. . . Lower rotary axis

13. . . Upper arm

14. . . Lower arm

15. . . Kick board on the invention

16. . . Kick board under the invention

17. . . Cutter

18. . . Rear guide

19. . . Waste guide

20. . . Conveyor

twenty one. . . Steel

twenty two. . . Hot rolled steel tip

twenty three. . . Hot rolled steel middle section

twenty four. . . Steel tail

25. . . Asymmetrical kick board

Figure 1 is a schematic view of the process of a conventional steel hot rolling end cutting machine.

Figure 2 is a front view of a conventional end-cutting machine kick plate structure.

Figure 3 is a schematic view showing the process of the steel hot rolling end cutting machine of the present invention.

Figure 4 is a front elevational view of the end-cutting machine kick plate structure of the present invention.

300‧‧‧modified end cutting machine

11‧‧‧Upper rotary axis

12‧‧‧lower axis of rotation

13‧‧‧Upper arm

14‧‧‧lower arm

15‧‧‧The kick board on the invention

16‧‧‧ Under the invention

17‧‧‧Cutter

18‧‧‧ rear guide

19‧‧‧ scrap guide

20‧‧‧Conveyor

21‧‧‧Steel

22‧‧‧ Hot rolled steel head end

23‧‧‧ Middle section of hot rolled steel

24‧‧‧Steel tail

Claims (4)

A kick plate structure of a high-speed end-cutting machine, comprising: an upper rotating shaft, a lower rotating shaft, an upper spiral arm, a lower spiral arm, an upper kick plate, a lower kick plate and all the blades, and the upper arm rotation axis control Connecting the upper arm and the upper kick plate, the lower arm rotating shaft controls the lower arm and the lower kick plate connected thereto, and the upper kick plate can be cut by the cutter when moving downward The scrap is kicked to a waste guide groove, and the lower kick plate can be used to kick the steel to be collected to the rear transport guide groove, wherein the shape of the upper kick plate and the lower kick plate are asymmetric. The upper kick plate length is less than the lower kick plate length, but the upper kick plate is the same as the lower kick plate. For example, in the kick plate structure of the high-speed end-cutting machine of claim 1, wherein the length of the upper kick plate is less than one-half of the length of the shortened steel tail, so that the upper kick plate still needs to be kicked to shorten the steel tail portion. Before the center of gravity. The kick plate structure of the high-speed end-cutting machine of claim 1, wherein the upper kick plate has a length of about 23 cm, and the lower kick plate has a length of about 43 cm. For example, in the kick plate structure of the high-speed end-cutting machine of claim 2, the length of the steel tail to be cut is shortened to about 60 cm.