TH35277A - A method for welding short pieces of steel from the furnace and rolling lines using the method. - Google Patents

Abstract

DC60 (03/12/40) Method for welding short steel bars coming out of a heated furnace in a rolling line, which consists of segments (10) between the heated furnace (11) and the rolling press, at least one drawing unit (14), roller tracks for transporting the short steel bars, a sliding welding assembly (20) with a welding rod (31) and an emergency cutting knife (13), in which the trailing end of a rolled short steel bar (12a) is welded to the leading end of a short steel bar (12b) that has been transferred afterwards from the furnace (11). While the short steel bar (12) is moving by the welding assembly (20) which is mounted on a sliding cart (19), the sliding cart (19) has a first condition of being stationary while it waits for the position of contact between the ends of the short steel bar (12) to be joined, and a second condition when it moves to where it has a speed in The actual rolling process involves grasping the short steel bar (12) with the jaws (31) of the welding unit (20) and welding the ends of the short steel bar (12). A third condition, which is a recoil in which the sliding cart (19) returns to its starting position, is followed by a descaling step performed by the descaling unit (16), in which the front surface of the short steel bar (12) and at least those areas of the short steel bar (12) working together with the jaws (31) are descaled, and by a milling step in parallel planes of the leading and trailing ends. A short steel bar (12) is processed by a scraping unit (29) fitted with at least one rotating blade (27) and mounted on a sliding cart (19) which leads to the immediate origin of the welding assembly (20), where the welding process is followed by a flash removal process performed by a flash removal unit (38). While the short steel bar (12) is moving, the rolling line for the short steel bar, which uses the sliding welding principle at the outlet of the heated furnace as in any of the preceding claims, consists of a spacer (10) between the heated furnace (11) and the first rolling platform, at least one drawing unit (14), roller tracks for transporting the short steel bar, assembly for The sliding welding assembly (20), including the welding clamps (31) and the emergency cutting knife (13), where the line is led to the end of the pulling unit (14), the first stationary soot removal unit (16), the sliding cart (19) which has alternating sliding on its relative inclined slip track (23), in which the sliding cart (19) supports at least the welding assembly (20) which has the jaws (31) to hold the short steel bar (12), the scraping unit (29) and the sliding soot removal unit (30), in which the sliding cart (19) has the first stationary section (19a) while it awaits the short steel bar (12) which is immediately led to the end of the soot removal unit. A stationary soot-forming first position (16) and a second end-movement position (19b), a travel path (37) with a roller (25) fitted onto a support rotating around a pivot (24) which has a first working position and a second retracting position, a temperature control system (34), an emergency cutting knife (13), a method for welding short steel bars coming out of the heated furnace in the rolling line, which consists of a segment (10) between the heated furnace (11) and the first rolling unit (14), at least a roller track for transporting short steel bars, a sliding welding assembly (20) with a welding rod (31) and an emergency cutting knife (13) on which the trailing end of the rolled short steel bar (12a) is welded. With the leading end of the short steel bar (12b) being transferred afterwards from the furnace (11), while the short steel bar (12) is moving by the welding assembly (20) fitted onto a sliding cart (19), the sliding cart (19) has one condition of being stationary, while it waits for the position of contact between the ends of the short steel bar (12) to be joined, a second condition when it proceeds to the point where it has the actual rolling speed, grasps the short steel bar (12) with the jaws (31) of the welding unit (20) and welds the ends of the short steel bar (12), and a third condition which is the reversal where the sliding cart (19) returns to its starting position, the welding process follows the descaling process which is performed by the descaling unit (16), where the front surface of the short steel bar (12) and at least those areas of the bar A short steel bar (12) working in conjunction with a screed (31) is deburred and by a planar cutting process in parallel planes of the leading and trailing ends of the short steel bar (12) is processed by a cutting unit (29) fitted with at least one rotating blade (27) and mounted on a sliding cart (19) which leads immediately to the welding assembly (20), where the welding process is followed by a flash removal process performed by a flash removal unit (38) while the short steel bar (12) is moving on the rolling line for the short steel bar, which will use the sliding welding principle at the outlet of the heating furnace as in any of the preceding claims, where the line consists of a section (10) between the heating furnace (11) and the first rolling platform, at least one drawing unit (14), roller tracks to transport the short steel bar, assembly for The sliding welding assembly (20), including the welding clamps (31) and the emergency cutting knife (13), where the line is led to the end of the pulling unit (14), the first stationary soot removal unit (16), the sliding cart (19) which has alternating sliding on its relative inclined slide (23), in which the sliding cart (19) supports at least the welding assembly (20) which has jaws (31) to hold the short steel bar (12), the scraping unit (29) and the sliding soot removal unit (30), in which the sliding cart (19) has the first position (19a) while it awaits the short steel bar (12) which is led to the end of the line. Immediately following the first stationary carbon removal unit (16) and the second end-movement position (19b), the travel path (37) with a ball bearing (25) fitted onto a rotating support section around a pivot (24) which has the first working position and the second retractable position, the temperature control system (34), and the emergency cutting knife (13).

Claims (23)

1. Method of welding short steel bars coming out of the heating furnace in the rolling line where the line consists of segments (10) between the heating furnace (11) and the first rolling platform, at least one pulling unit (14) with a roller track to transport the short steel bar, a sliding welding assembly (20) with welding jaws (31) and an emergency cutting knife (13) in which the trailing end of the rolled short steel bar (12a) is welded to the leading end of a short steel bar (12b) being transferred from the furnace (11). Then, as the short steel bar (12) moves along by the welding assembly (20) rubbing against a sliding trolley (19), the trolley (19) has a special characteristic in that it is stationary in one condition while it waits for the contact position between the ends of the short steel bar (12) to be met, and in a second condition as it moves to where it will It is brought to the actual rolling speed, grasping the short steel bar (12), and there is a third condition which is a reverse, where the sliding cart (19) is brought to its starting position, where the welding process is followed by the descaling process which is performed by the descaling unit (16), where the front surface of the short steel bar (12) and at least those areas of the short steel bar (12) working with the teeth (31) are descaled, and by the planar milling process of the leading and trailing ends of the short steel bar (12) which is performed by the milling unit (29) which is fitted with at least one rotating blade (27) and mounted on the sliding cart (19) which is brought to the immediate beginning of the welding assembly (20), where the welding process is followed by the flash removal process which is performed by the flash removal unit (38) while the short steel bar (12) is moving. 2. The method as in claim 1, in which the short steel bar (12) is centered in the jaws (31) of the welding assembly (20) along the hypothetical centering axis (39) of the section of the short steel bar (12) in their bodies. 3. As in any of the preceding claims, the short steel bar (12) is subjected to a second descaling step by a sliding descaling unit (30) immediately brought to the side during the welding process. 4. The method as in any of the preceding claims, in which the scraping unit (29) shall consist of a system of two rotating blades (27a, 27b) coupled to a single axis (28), in which the first blade (27a) shall be arranged to cut the rear end of a forward-positioned short steel bar (12a), while the other blade (27b) shall be arranged for parallel and simultaneous cutting of the forward end of a backward-positioned short steel bar (12a). 5. The procedure as in any of the preceding claims, in which the relative end-cutting of the short steel bar (12) is performed after the descaling procedure which is carried out while the short steel bar is moved by a second descaling unit (30) which is loaded onto a movable cart (19). 6. The method as in claim 5, in which the second (30) deburring machine is of the rotating type and acts specifically in the area where the short steel bar (12) is to be welded. 7. Such methods as in claim 5 or 6, in which the second descaling device (30) has a number of descaling cycles and/or parameters for water flow and/or pressure that can be adjusted. 8. In any of the preceding claims, the pre-welded short steel bar (12) passed into the rolling mill shall be subjected to at least a limited heating operation. 9. A method as in claim 8 that enables induction heating operation. 10. A method as in claim 8 that provides heating with a flash system. 11. A method as described in claim 8, which provides heating using a tunnel heating system. 12. A rolling line for short steel bars, which shall use the principle of sliding welding at the outlet of the heating furnace as in any of the preceding claims, in which the line shall consist of a segment (10) between the heating furnace (11) and the first rolling table, a drawing unit (14), at least one roller track for transporting short steel bars, a sliding welding assembly (20), including welding clamps (31) and emergency cutting knives (13), in which the line shall be characterized by the introduction to the end of the drawing unit (14), a first stationary descaling unit (16), a sliding cart (19) with alternating movement on its relative inclined sliding track (23), in which the sliding cart (19) shall support at least one set The assembly includes a welding arm (20) with teeth (31) for gripping and extending a short steel bar (12), a scraping unit (29), and a sliding soot removal unit (30), where the sliding cart (19) has a first position (19a) while it waits for the short steel bar (12) which is immediately directed to the first stationary soot removal unit (16) and the second end position (19b), a travel path (37) with rollers (25) mounted on a rotating support arm (24) which has a first working position and a second retracting position, a temperature control system (34), and an emergency cutting knife (13). 13. The deburring line, as in claim 12, where the first stationary deburring unit (16) shall have a stationary type nozzle (18) and a rotating type nozzle (18). 14. The rolling line, as in claim 12 or 13, where the clamp for welding (31) is movable along the assumed center axis (39) of the section of the short steel bar (12). 15. The rolling line, as in any of the claims 12 through 14 included, which has a unit to eliminate flash (38) on a movable cart (19). 16. The rolling line, as in any of the claims 12 through 15 included, in which the second retractable position of the pivot rotating part (24) works in conjunction with the sliding cart passage (19). 17. The rolling line, as in claim 16, where the sliding cart (19) is coupled to the front section with a fork-shaped mechanism (26) that works in conjunction with a pivot supporting (24) to move them from position one to position two and vice versa. 18. The line of work, as in any of the claims 12 through 17 that are included, which leads to the origin of the emergency cutting knife (13) has a pull unit (33). 19. The rolling line, as in any of the claims 12 through 18 included, which is located next to the roller root (37) and exits the line has a storage surface (35) to temporarily store short steel bars (12) in the event that there is a blockage in the rolling mechanism. 20. The rolling line, as in any of the claims 12 through 19 which are included, shall have a temperature control system (34) consisting of a mechanism for further heating and a mechanism for uniform heating of the surface and core of the short steel bar (12), especially in areas where connections are made. 21. Rolling line, as in claim 20, where the heating system consists of a tunnel coupled with a heating furnace. 22. Rolling line, as in claim 20, where the heating system consists of a rapid induction heating mechanism. 23. The rolling line, as in claim 20, whereby the temperature control system (34) is coupled at the bottom with a rod-shaped packing element (36) which can be opened to release and discharge waste and soot (Clause 23, page 7, figure 7).