JP3318493B2 - Hot working method and working equipment for hot work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, in a steel industry, a hot steel material conveyed by a conveying roller is synchronously driven by a traveling body equipped with a processing device for welding and cutting and a clamping device. The present invention relates to a running machining method and a running machining facility for preventing a skid mark from being generated in a hot steel material when running, welding, cutting, or the like is performed between runs.

[0002]

2. Description of the Related Art In the steel industry, for example, there is a process of cutting hot steel materials or welding hot steel materials together in a hot continuous processing line. In order to improve the productivity of this continuous processing, cutting is performed. There has been an increasing demand for so-called running work, in which processing such as welding is performed while a hot steel material is running.

[0003] Conventionally, as a running steel working equipment for performing this running work, as shown in FIG. 4, for example, as shown in FIG. 4, a running body b equipped with a working device a and clamping devices ka and kb is driven. A drive device e is provided so as to be able to travel on a track r laid on a gantry d over a transport roller c driven by a device (not shown).
And the clamp devices ka, kb
In this regard, there has been proposed a running machining apparatus configured to clamp the hot steel material and perform the above-described processing on the hot steel material s being conveyed by the conveying roller d during the running.

[0004] In such a running machining apparatus, when the traveling body is driven for the traveling processing, when the processing device mounted on the traveling body and the clamping device interfere with the transport roller, the traveling becomes impossible. In order to make the transport roll retreatable, the supporting span of the hot steel material becomes longer, and the rear end of the preceding steel material and the front end of the succeeding subsequent hot steel material bend under their own weight and become larger from the pass line. In some cases, the rear end portion of the preceding hot steel material and the front end portion of the following hot steel material cannot be clamped by the clamp device, and the running process may not be performed. For this reason, there has been proposed a running machining apparatus in which a transport assisting roll is disposed on a traveling body and a hot steel material is supported by the transport assisting roll when the transport roll is retracted.

[0005] As described above, the transporting auxiliary roller is disposed on the traveling body, and the hot material conveyed by the transporting auxiliary roller is supported and clamped by the clamp device.
Since the hot material and the transport auxiliary roller run synchronously, they are stopped between them. For this reason, while being clamped by the clamp device, the hot material comes into contact with the transport auxiliary roller.

[0006] The temperature of the transport auxiliary roller is about 100 ° C, and the temperature of the hot material is about 900 ° C, and the temperature difference between the two is large. And a low-temperature portion on a straight line in the sheet width direction of the hot material, that is, a skid mark is generated, and for example, there is a problem that the quality of a steel material obtained by rolling cannot be stably maintained. . (Reference techniques: Japanese Patent Application Laid-Open Nos. 62-53242 and 7-1007)

[0007]

SUMMARY OF THE INVENTION According to the present invention, a traveling body on which a working device and a clamp device are mounted is moved synchronously with respect to a hot material conveyed by a conveyance roller, and the hot material is conveyed by the clamp device. A method and a facility for hot-working machining of a hot-working material that can prevent the occurrence of skid marks by preventing the hot-working material from coming into contact with the transport assist roller disposed on the traveling body while clamping is performed. Is what you do.

[0008]

Means for Solving the Problems The first invention of the present invention is:
Processing device, clamp device A traveling body equipped with a plurality of transport auxiliary rollers is arranged to be able to move forward and backward along the transport direction of the hot material, and the hot material transported by the transport auxiliary rollers is clamped. The hot working material is processed by the processing device in a state where it is clamped, and the clamp is released by the clamping device when the processing is completed and the traveling body is moving forward in the conveying direction of the hot material. In the running machining method, a heating pad is disposed between the transport auxiliary rollers, and while the hot material is clamped by the clamp device for the processing, the hot material is supported by a heated pad. In addition, a hot working material is supported by a transport assisting roller before and after the clamping and after the clamping is released.

[0009] The second invention to the fourth invention are positioned as examples of a running machining facility for implementing the first invention. According to a second aspect of the present invention, a traveling body on which a plurality of conveyance assist rollers are mounted, a processing device and a clamp device, are disposed so as to be able to move forward and backward along the conveyance direction of the hot material, and are conveyed by the conveyance assist rollers. The hot work is processed by the processing device in a state of being clamped by the clamp device, and the clamp is released when the processing is completed and the traveling body is moving forward in the transport direction of the hot work. In the processing equipment, a heating pad provided with a heating device is provided between the transport auxiliary rollers so as to be vertically movable, and is capable of supporting the hot material clamped by the clamping device. Running machining equipment. According to a third aspect of the present invention, a traveling body having a plurality of transport assist rollers provided with a processing device and a clamp device is disposed so as to be able to travel forward and backward along the transport direction of the hot material, and is transported by the transport assist rollers. The hot work is processed by the processing device in a state of being clamped by the clamp device, and the clamp is released when the processing is completed and the traveling body is moving forward in the transport direction of the hot work. In the processing equipment, the transport auxiliary roller is vertically movable, and a heating pad having a heating device is provided between the transport auxiliary rollers,
A hot working material processing facility, wherein the hot material clamped by the clamp device can be supported by a heated heating pad. According to a fourth aspect of the present invention, a traveling body equipped with a plurality of transporting assist rollers of a processing device and a clamping device is disposed so as to be able to travel forward and backward along the transport direction of the hot material, and is transported by the transport assisting rollers. The hot work is processed by the processing device in a state of being clamped by the clamp device, and the clamp is released when the processing is completed and the traveling body is moving forward in the transport direction of the hot work. In the processing equipment, the transport auxiliary roller is vertically movable, and a heating pad having a heating device is disposed between the transport auxiliary rollers so as to be vertically movable, and the hot material clamped by the clamp device is heated. This is a running material processing apparatus for hot work, which can be supported by a heated heating pad.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a hot working material is processed by a processing device in a state of being clamped on a conveying auxiliary roller, and after the processing is completed, the traveling body advances in a conveying direction of the hot hot material. When applying, it is applied in the running method of the hot material so as to release the clamp in the clamp device, by disposing a heating pad with a heating device between the transport auxiliary rollers The supporting of the hot material by the transport auxiliary roller is performed before and after the clamp is released by the clamp device, and the hot material being clamped by the clamp device is supported by the heated heating pad so as not to contact the transport auxiliary roller. This is characterized in that skid marks are not generated in the hot work.

If the temperature of the heating pad for supporting the hot material is 500 to 700 ° C., no skid mark is generated. Therefore, this heating pad is provided with various electric heating devices and burner heating devices.

The heating pad is usually arranged between the transport auxiliary rollers so that the relative position between the heating pad and the transport auxiliary roller can be adjusted. For this purpose, either the heating pad or the transport auxiliary roller is configured to be movable up and down so that the support of the hot work can be shared, and the hot work is supported by the heating pad during clamping by the clamp device. Before and after the clamp is released, it can be supported by the transport assisting roller.

For this purpose, from the viewpoint of simplifying the structure and reducing the equipment cost, the vertical movement structure is provided with a heating pad.
It is more preferable that the transport assist roller is fixedly arranged. This vertical movement can be easily controlled, for example, by synchronizing with the operation of the clamp device.

Although the present invention is intended to prevent the occurrence of a sodid mark by the transport assisting roller, the hot material is also cooled by the clamp device during the clamping by the clamp device, and the influence is smaller than when the transport assisting roller is used. Although not so large, the temperature distribution of the hot material is made non-uniform, so that the clamping device is also provided with a heating device, and it is preferable to heat during the clamping.

The hot working method of the present invention can be carried out using the hot working equipment of the present invention configured as described above. According to the present invention, when the hot work conveyed by the support of the conveyance assist roller is clamped by the heating clamp device (from the start of clamping to the release of the clamp) in order to perform the running process, the hot work is supported by the heated heating pad. And
After the clamp is released, it is supported and transported by the transport auxiliary roller, and the hot material in the clamp is supported by the heated heating pad and is not supported by the transport auxiliary roller. The intermediate member is not locally cooled and does not generate skid marks. Therefore, it is possible to stably maintain the uniformity of the temperature of the hot material after the running process, and to stably maintain the quality of the product obtained in the next process such as the rolling process.

An embodiment of a hot working method and a hot working equipment according to the present invention will be described below with reference to FIGS. In this embodiment, a heated slab 1 is roughly rolled by a rough rolling mill 2, and the obtained hot steel material 1 o is temporarily stored in a coil box 3, and then guided to a finishing rolling mill 5 by a conveying roller 4, and this finish rolling is performed. When the steel plate 1p is manufactured by continuous rolling with a hot rolling machine, the hot steel material 1 continuously conveyed back and forth by the conveying roller 4 between the coil box 3 and the finish rolling mill 5
This is a case where the present invention is applied as a running welding facility for welding a and b during running.

In the traveling welding equipment 6, a heating clamp device 7 having an upper clamp plate 7o and a lower clamp plate 7u which are raised and lowered by a hydraulic cylinder 7c and having a built-in heating device h is provided.
a, 7b, and the traveling body 9 equipped with the welding device 8 are moved synchronously with the preceding hot steel material 1a conveyed by the conveying rollers 4 and the succeeding hot steel material 1b following the same, and the relative speed is reduced. When the value becomes 0, the rear end of the preceding hot steel 1a and the front end of the following hot steel b are clamped by the heating clamp devices 7a and 7b, and the leading hot steel 1a and the following hot steel 1b are butted. The parts are configured to be welded while running by the welding device 8.

In the state shown in FIG. 1, the traveling body 9 is run, and the conveying roller 4 below the traveling body is retracted to the position indicated by the dotted line. This shows a state in which the hot-rolled steel material 1b is clamped and is subjected to running welding by the welding device 8.

FIGS. 2 and 3 show the state of the traveling body 9.
In a state where the transport roller 4 under the traveling body is retracted to the position indicated by the dotted line, the heating clamp device 7a,
7b shows a state immediately before the preceding hot steel material 1a and the following hot steel material 1b are clamped, and a state immediately before welding by the welding device 8.

The traveling body 9 is disposed by a driving device 10 on a track 11 laid along the transport direction of the transport rollers 4 so as to be able to travel in the transport direction across the transport rollers 4. 4, the preceding hot steel material 1a and the following hot steel material 1b can be clamped by the heating clamp devices 7a and 7b, and can be welded by the welding device 8 during running.

The transport roller 4 in the traveling area of the traveling body 9
Since it interferes with the lower portions of the heating clamp devices 7a and 7b mounted on the traveling body 9, the heating clamp device 7
A structure is provided to automatically return to the original transport position after retreating to avoid interference with the lower portions of a and 7b.

When the transport roller 4 is retracted, the traveling body 9 is provided with transport auxiliary rolls 12a to 12d which form a transport path line PL in place of the transport roller 4. The transport assist rollers 12a to 12d have a structure that can be moved forward and backward (up and down) with respect to the transport path line PL by the transport roller 4 by the elevating device 13. Also,
A heating pad 14 is provided between the transport assist rollers. The heating pad is configured to be able to move forward and backward (up and down) with respect to the transport path line PL by an advance / retreat device 15 and includes a heating device 16.

The vertical movement (advance / retreat) of the transport assist rollers 12a to 12d and the heating pad 14 with respect to the transport path line PL is performed by, for example, generally known mechanical means, electrical means, or a combination of electrical and mechanical means. Thereby, the operation can be performed with good timing in cooperation with the operation of the heating clamp device. (The description of these specific means is omitted here.)

Here, the transport auxiliary rollers 12a to 12a
The d and the heating pad 14 can be moved up and down with respect to the transport path line PL so that the position of the transport path line PL can be easily adjusted. However, here, the transport auxiliary rollers 12a and 12b are not moved up and down. Only the heating pad 14 is moved up and down to change the support distribution of the hot steel materials 1a and 1b.

The above-mentioned transport auxiliary rollers 12a to 12d
When the transport roller 4 performs the retreat operation, the transport path line PL of the hot steel materials 1a and 1b is formed in the traveling traveling body 9, and the transported hot steel material is supported and transported. Then, when the relative speed between the transport speed of the hot steel materials 1a and 1b and the traveling speed of the traveling body 9 becomes 0, the hot steel materials 1a and 1b are clamped by the heating clamp devices 7a and 7b, and at the same time, between the transport auxiliary rollers. The hot pats 14a and 14b are raised to support the hot steel materials 1a and 1b.

That is, during the clamping by the heating clamp devices 7a and 7b, the hot steel materials 1a and 1b are supported by the heated heating pad 14, and are not brought into contact with the transport auxiliary rollers 12a and 12b so that the hot steel materials 1a and 1b are not contacted. No skid mark is generated in 1b by the transport assist roller. Then, the running welding is completed and the heating clamp device 7a,
The heating pad 13 is lowered at the same time as the clamping of the hot steel materials 1a and 1b by the 7b is released, and the hot steel materials 1a and 1b are supported and carried out by the auxiliary transport rollers 12a to 12d. After being carried out, the traveling body 9 is retracted to the original position to prepare for the next traveling welding work.

In the traveling welding according to the present invention thus constructed, the hot steel members 1a and 1b are supported by the heated heating pad 13 while being clamped by the heating clamp devices 7a and 7b, and the transport assist rollers 12a , 12b are not brought into contact with each other, so that no skid marks are generated by the transport assist rollers on the hot steel materials 1a, 1b carried out after the welding during traveling. In addition, since the hot steel materials 1a and 1b are clamped while being heated by the heating clamp devices 7a and 7b, there is no local temperature drop by the clamp device, and the hot steel materials having a uniform temperature distribution are carried out to the next step. be able to.

When the transport roller 4 which interferes with the heating clamp devices 7a and 7b and the welding device 8 is retracted during traveling welding, the traveling assist roller 12a to 12d provided on the traveling body is used for traveling welding. Since the pass line PL of the steel material to be formed can be formed, the hot steel materials 1a and 1b do not bend. Therefore, hot steel 1a to be welded during running is
1b can be reliably clamped to realize smooth running welding. In the figure, reference numeral 15 denotes a pressing roll.

The present invention is not limited to the above embodiment. For example, in the embodiment, the present invention is applied to a running welding apparatus for performing running welding for hot steel materials, but other steel materials and non-ferrous metal materials may be used. The present invention can also be applied as a running processing equipment for running cutting, running processing, and the like. Therefore, for example, the processing device, the clamping device, the structure of the transport auxiliary roller, the structure of the heating pad, etc., which constitute the running processing equipment, depend on the application target, the processing line speed, and the like.
Alternatively, it may be changed within a range satisfying the scope of claim 2.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Using a hot-rolling equipment for hot steel as shown in FIGS. 1 to 3, it is rolled by a finishing rolling mill of a continuous hot rolling mill, and has a thickness of 40 mm in a conveying process at a speed of 100 m / min. For a steel sheet having a width of 1200 mm and a temperature of 900 to 1050 ° C., a butt portion of a preceding steel sheet and a succeeding steel sheet continuous in front and back is subjected to running welding by applying the running welding equipment and the running welding method of the present invention. Then, the condition of the joint after skid welding and the condition of the occurrence of skid marks were evaluated. Implementation conditions and evaluation results will be described below.

(Execution conditions) Heating clamp device Clamping width (one side): 1000 mm Clamping part temperature: 600 ° C. Clamping time: 10 to 30 seconds Number of auxiliary transport rollers: 6 Roller diameter: 350 mm Distance between rollers: 1500 mm Heating pad Heating method : Electric heaters Number of arrangements: 1 each Support width: 800 mm Support length: 1300 mm Support temperature: 500 to 800 ° C Welding Welding method: Laser beam welding speed: 3 to 10 m / min

(Evaluation Results) (1) In Example 1 of the present invention in which the clamp surface of the heating clamp device and the heating pad in the clamp were heated to 600 ° C.
Clamping by the heating clamp device could be performed smoothly, and no occurrence of positional displacement between the welded plate ends that would impair the joint strength was observed. In addition, no skid mark was generated, and no local temperature drop that could be visually recognized on the contact surface with the clamp surface was observed. (2) Example 2 of the present invention in which the heating pad was heated to 600 ° C., but the clamp surface of the heating clamp device was not heated.
Did not show any skid marks. However, the clamp surface at the end of the steel plate was slightly low-temperature color, and although the quality of the steel plate was not impaired in the next process, it was recognized that the temperature was lower than other portions. (3) In the third embodiment of the present invention in which the clamp surface of the heating clamp device is heated to 600 ° C. and the heating pad in the clamp is heated to 600 ° C., a local portion that can be visually identified from the contact surface with the clamp surface. No temperature drop was observed. In addition, at the contact portion with the heating pad, the quality of the steel sheet was not deteriorated in the next step, but it was recognized that the temperature was lower than the other portions. (4) On the other hand, although the clamping surface of the heating clamp device was heated to 600 ° C., the contact surface with the clamping surface was used in Comparative Example 1 in which there was no heating pad and the heating clamp device supported the conveyance clamp roller during clamping. No local temperature drop that could be visually discriminated was observed, but the occurrence of skid marks that could be easily discriminated visually was observed at the contact portion with the transport auxiliary roller.

[0033]

According to the present invention, even when the transporting roller interfering with the clamping device and the processing device is retracted during the traveling process of the hot material, the traveling assisting roller provided on the traveling body is used for the traveling process. Since a hot hot material pass line can be formed, the hot material does not bend. Therefore, it is possible to reliably clamp the hot work to be processed during running and realize smooth running. Also, while the clamp is being clamped by the clamp device, the support of the hot material is supported by the heated heating pad and is not supported by the transport auxiliary roller, so that the occurrence of skid marks can be reliably prevented, and the running can be prevented. The product quality obtained by hot working can be stably ensured.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side schematic explanatory view showing an example of an arrangement of a continuous hot rolling facility in which a running working facility of the present invention is applied as a running welding facility.

FIG. 2 is a partially cross-sectional enlarged side view schematic explanatory view showing a structural example of the running welding equipment of FIG.

FIG. 3 is a schematic explanatory view of a section (front) taken along the line Aa-Ab in FIG.

FIG. 4 is a schematic side view showing an example of a conventional running machining equipment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Billet 1o, 1a, 1b Hot steel 1c Hot rolled steel plate 2 Rough rolling mill 3 Coil box 4 Conveyance roller 5 Finish rolling mill 6 Running processing equipment 7a, 7b Heat clamping device 7c: Hydraulic cylinder 7o Upper clamp plate 7u Lower Clamping plate h Heating device 8 Welding device 9 Traveling body 10 Drive device 11 Track 12a to 12e Transport assist roller 13 Elevating device 14a to 14d Heating pad 15 Advance / retreat device 16 Heating device 17 Holding roller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-92705 (JP, A) JP-A-9-276906 (JP, A) JP-A-61-74707 (JP, A) JP-A-7-276 88505 (JP, A) JP-A-7-171604 (JP, A) Japanese Utility Model Application Hei 5-202 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 1/00-11 / 00 B21B 15/00 B23K 37/04

Claims (4)

(57) [Claims] A traveling body on which a plurality of transport assist rollers are mounted so as to be able to move forward and backward along a transport direction of a hot material, and a hot body transported by the transport assist rollers. The material is processed by the processing device in a state of being clamped by the clamp device, and the clamp by the clamp device is released when the processing is completed and the traveling body is advancing in the transport direction of the hot material. In the running method of the hot work, the heating pad is disposed between the transport auxiliary rollers, and the hot work is heated while the hot work is clamped by the clamping device for the working. A method of working while working a hot work, wherein the hot work is supported by a heating pad, and the hot work is supported by a transport auxiliary roller before and after the clamp is released. 2. A processing device, a clamp device, and a traveling body on which a plurality of transport auxiliary rollers are mounted, which is disposed so as to be able to freely move forward and backward along the transport direction of the hot work material, and heat transferred by the transport auxiliary rollers. The intermediate member is processed by the processing device in a state of being clamped by the clamp device, and while the processing is completed and the traveling body is moving forward in the transport direction of the hot intermediate member, the traveling process for releasing the clamp is performed. In the equipment, a heating pad provided with a heating device is disposed between the transport auxiliary rollers so as to be movable up and down, and the hot material clamped by the clamping device can be supported. Cold working equipment. 3. A traveling body on which a plurality of transport auxiliary rollers mounted on a processing device and a clamp device is disposed so as to be able to travel forward and backward along the transport direction of the hot work, and the heat transported by the transport auxiliary rollers. The intermediate member is processed by the processing device in a state of being clamped by the clamp device, and while the processing is completed and the traveling body is moving forward in the transport direction of the hot intermediate member, the traveling process for releasing the clamp is performed. In the equipment, the transport auxiliary roller is vertically movable, and a heating pad provided with a heating device is provided between the transport auxiliary rollers, and the hot material clamped by the clamp device is heated by a heated pad. A hot-running work processing equipment that can be supported. 4. A traveling body on which a plurality of transport auxiliary rollers mounted on a processing device and a clamp device is disposed so as to be able to run forward and backward along the transport direction of the hot material, and the heat transported by the transport auxiliary rollers. The intermediate member is processed by the processing device in a state of being clamped by the clamp device, and while the processing is completed and the traveling body is moving forward in the transport direction of the hot intermediate member, the traveling process for releasing the clamp is performed. In the equipment, the transport auxiliary roller is vertically movable, and a heating pad provided with a heating device is disposed between the transport auxiliary rollers so as to be vertically movable, and the hot material clamped by the clamp device is heated. A hot working material processing facility that can be supported by a heated pad.