DE2805022A1 - CUTTING DEVICE FOR CONTINUOUS HOT CUTTING OF METAL BARS IN THEIR LONGITUDINAL DIRECTION - Google Patents

Description

BLUMBACH. WESER. BERGEN. CHANDLER

ZWIRNER. DEER . BREHM 280S022

PATENT LAWYERS IN MUNICH AND WIESBADEN

Patentconsult Radeckestraße 43 8000 Munich 60 Telephone (089) 883603/883604 Telex 05-212313 Telegrams Patentconsult Patentconsult Sonnenberger Straße 43 6200 Wiesbaden Telephone (06121) 562943/561998 Telex 04-186237 Telegrams Patentconsult

Roberto MARIMJCCI February 6, 1978

Via Lucio SJLlIa, 59 AN-10

80124-Napoli / Italy

Cutting device for continuous V / arm cutting of metal bars in their longitudinal direction

Description:

The invention relates to a cutting device for multiple, continuous hot cutting of metal bars with square, in particular rectangular cross-section, which is connected downstream of a continuous caster in the steelworks and / or a rolling mill is.

There are currently no mechanical devices

Munich: R. Kramer Dipl.-Ing. . W. Weser Dipl.-Phys. Dr. rer. nat. · P. Hirsch Dlpl.-Ing. · HP Brehm Dipl.-Chem. Dr. phil. nat. Wiesbaden: PG Blumbach Dipl.-Ing. · P. Bergen Dipl.-Ing. Dr. jur. · G. Zwirner Dipl.-Ing. Dipl.-W.-Ing.

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known for hot cutting in the longitudinal direction, that of a continuous caster or are immediately downstream of a rolling mill. Even if cutting in the longitudinal direction is sometimes carried out is, this is only possible outside the production line and limited to smaller quantities and with the accumulation of Waste and considerable costs associated.

The object of the invention is to provide a cutting device for the continuous hot cutting of in a continuous caster A steel mill produced and / or deformed in a rolling mill metal rods with square, in particular rectangular Provide cross-section in the longitudinal direction, with which the previous disadvantages are eliminated and the Workflow is significantly simplified and improved.

You cutting device according to the invention consists essentially from two mechanical, complementary working units; the first unit consists of two mechanically working, driven cutting rollers, each provided with grooves, the width of which corresponds to the width of the bars after the cut and the depth of which is less than the height of the rods; the grooves are arranged one above the other with the proviso that each Groove the one. Roller cooperates positively with a groove-free area of the other roller; the total number of grooves in the upper and lower cutting rollers corresponds to the total number of bars after the cut; the cutting rollers are in one piece formed or can consist of several ^ the above

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given profile be composed of the resulting parts; the second unit includes a number of tools, the number of which is adapted to the number of bars cut; the tools are adapted to the cross-sections of the cut bars and attached to the sturdy support structure of the cutting device; the tools are located above and below the

cut rods and are used to guide and hold them as lateral pressure elements and / or as pushing apart Elements; Individual tools are provided with profiles that, depending on the production requirements, the sharp edges of the cut Scrape or deburr the bars.

Further advantageous embodiments and features of the Cutting device according to the invention emerge from the subclaims.

With the cutting device according to the invention, inter alia the following advantages achieved.

In the production of steel by means of continuous casting plants Systems are used that are designed differently with regard to products with a large, medium or small cross-section are; In addition, it is currently customary to operate such systems with several lines and / or several line lines, to get products with the different cross-sections,

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promoted by the market and / or downstream equipment; i.e., for each product cut one or more strands must be provided. In contrast, by using the cutting device according to the invention created the possibility of the special systems intended for the production of wide slabs also for the Manufacture of ^ products with a smaller rectangular or square shape Utilize cross-section, e.g. for billets, blooms and small slabs; for the other systems also exists the possibility of casting just a single strand and from this strand the products with other dimensions directly then the warning cutting that takes place in the longitudinal direction to manufacture.

In rolling mills for the deformation of blocks are currently. for the production of products with smaller cross-sons and of Semi-finished products are often complicated, expensive, highly energy-consuming and sometimes unsuitable in terms of quality Intermediate rolling mills with low efficiency and low Efficiency connected in series. Furthermore, due to the limited possibility of moving longer Intermediate cuts are often made in the transverse direction of the bars, which decreases the performance (increasing waste). In other cases it is necessary to provide expensive heating furnaces to bring the bars back to full temperature, resulting in high operating and maintenance costs. In contrast, it is sufficient with application and optimal classification of the inventive

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"Cutting device in the rolling process, only to produce a preliminary product with a cross-section in the rolling mill, its thickness the height of the cut bars and the width of which corresponds to the total width of all bars to be cut in the longitudinal direction.

By switching on the cutting device according to the invention, both in systems for the production of steel after the continuous casting process with the specified different continuous casting lines, as well as in rolling mills for production of ingots, all of the above-mentioned disadvantages are avoided; this largely improves the performance of the systems, see above that the annual production can be increased considerably.

The design of the cutting device according to the invention is based on the following concept. According to the basic idea of According to the invention, the cutting takes place as a result of the effect of the cutting force in the respective cross-section (or in the respective Cross-sections), which through the contact surfaces of the rotating rollers with the (upper or lower) rod area and the to the axes of rotation at the corresponding boundaries of these surfaces parallel plane is determined, namely as a result of the sliding over each other both surfaces of this cross-section, which is continuously renewed by the entrainment of the rotating parts, this sliding over one another - a complete separation corresponding to the vertical plane passing through the axes of rotation

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of the greatest strength portion ^ of the rod - at the same time has also caused a permanent deformation of the remaining starch content, which is exclusively due to this deformation by means of the tool assembly expediently arranged at the exit of the bars from the cutting rollers in a simple manner can be separated, which are conveyed on to the Yferkzeug, which is appropriately profiled in a predetermined manner Rods in the horizontal plane exert a force that pushes them apart and a slight tensile force in the transverse direction.

The cutting rollers provided according to the invention should have certain profiled grooves and consist of a material that withstands the expected loads; Preferably, the cutting rollers are cooled during operation to the during of contact with the red-hot rod to be cut to dissipate the heat absorbed. The arrangement of the cutting rollers on the tiagger stand can be done in a manner known per se, namely once vertically, around the "pass-line" road opposite the one for the Conveyor rollers and the exit rollers to set a common horizontal plane in relation to the thickness of the bar to be cut, as well as with regard to the turning axes of the cutting rollers rotating in opposite directions, so that the grooved sections of the rollers are positively aligned with the groove-free sections.

The cutting rollers provided according to the invention are by means of Ball bearings and fittings held in the supporting structure of the

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Device are arranged so that they correspond to the loads occurring, and provided for the rollers Settings are enabled.

In a further embodiment of the invention it is provided that the cutting rollers via mechanical transmission members of a Motor driven by adequate power; the rollers can be dismantled in a simple manner from the supporting structure and used against others Rolls are exchanged, which are intended for a corresponding production program.

On the preferably strong supporting frame of the facility are according to a further embodiment of the invention according to the number of bars cut and their Cross-sectional dimensions, one or more lower tools and one or more upper tools attached, which accordingly the lower or the upper position, as a guide, bracket, lateral pressure elements and / or elements that push apart works. The tool assembly is assembled to match the cutting rollers and can be removed from the supporting frame in a simple manner in the event of wear dismantled and / or exchanged to convert to a new production program.

These tools complement the way the cutting rollers work, since the tools according to the invention have the task of to effect the complete separation of the cut rods from one another and the rods as a guide, as a holder, as

lateral pressure elements or as pushing the cut bars apart Elements to serve as soon as the bars are moved out of the working area of the cutting rollers. The one The end of these tools rests against the cutting rollers; the other end of the tools is anchored to the supporting structure. The upper or lower position of the tools is adapted to the position of the grooved or groove-free areas of the cutting rollers; each tool has a particular inclination with respect to the "pass-line" road for severing.

In addition to the inclination of the tools, point to the "pass-line" road some tools on their front part, where the cutting rollers, opposite side, the shape of a wedge; with this wedge-shaped section, the cut rods pushed apart; or so that a pressure is exerted on the cut rods in order to completely separate the to effect cut rods among each other. Some of these tools also have profiles to avoid the sharp edges scrape off and deburr the cut bars.

All tools should be made of a material that can withstand the expected loads; the tools are during during operation, in order to limit the wear caused by friction with the bars emerging from the cutting rollers. The tools are also designed with a suction device known per se to remove work chips or Remove slag.

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The ones on both sides of the roller conveyor to align the driveway of the rod in the direction of the cutting area to guides arranged in the longitudinal direction are formed in a known manner and arranged; this also applies to the similar, lateral! guides for holding the cut bars the roller conveyor towards the exit of the cutting system.

The advancement of the incoming material from the continuous caster or from the rolling mill is increased in the direction of the cutting rolls conveyed by gripping rollers arranged parallel to the horizontal plane or by rollers arranged above and below the bar; the action of the cutting rollers ensures that the bars are transported further during and after the cutting process Speed of rotation is synchronized with the speed of the retracting rod; thereby wi:? d also that at the same time Material is captured and continuously carried along on the roller conveyor until the bars are cross-cut to the prescribed length.

The cutting device according to the invention thus ensures the following advantages:

the continuous hot cutting in the longitudinal direction from directly from the continuous casting plant of a steel mill and / or metal bars coming from a rolling mill;

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the standardization of the dimensions of semi-finished products downstream of these plants; the elimination of any restriction on the final cross-section of the semi-finished product; the elimination of all intermediate steps in order to obtain the initial dimensions of the product until it reaches reduce its end cross-section; a decisive improvement in the utilization of Continuous casting plants and / or of rolling mills; a reduction in manufacturing costs; and the extended possibility of products whose dimensions are required by a large number of consumers will be brought to market at a much more economical price.

An embodiment will now be described with reference to FIGS the cutting device according to the invention explained in more detail; show in detail:

Fig. 1 is a side view of the invention Cutting device with cutting rollers and complementary tools;

FIG. 2 shows a rear view of the cutting device according to FIG. 1;

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Pig. 3 the cutting direction according to Pig. 1, seen from above, above the "pass-line" road;

Pig. 4 a block diagram of the entire "work line;

Fig. 5 in a schematic representation of the in four individual steps subdivided cutting process on three rods, with the respective rod cross-section after each Single step is shown hatched; and

Pig. 6 a scheme for the arrangement of the different Tools for lower and upper alignment and for all cutting combinations.

In the pig. t, 2 and 3 are three views of the invention Cutting device shown schematically. The two cutting rollers are denoted by 11 and 12; from a (not shown) The metal rod 4 brought up to a continuous caster or a rolling mill is placed in the gap between the cutting rollers 11 and 12 .zu-led; with 21, 22 and 23 are the ones on the cutting rollers 11 and 12 denotes subsequent tools; the profiles 21 "are used to deburr the cut bars; the cut Bars 5 are conveyed onward via roller conveyor 32 and arrive in cooling zone 7.

Pig · 4 shows a block diagram from which the optimal arrangement of the cutting device within the production line

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can be found.

In FIG. 5, 4 denotes the rod coming from the continuous caster or from the rolling mill, which rod passes over the roller conveyor 31 is brought up. The rod 4 is gripped by the cutting rollers 11, 12 with the grooves 11 'and 12'. The in the through Bar cross-sections lying on the plane going through the roller axis are shown with hatched areas 51, 52 and 53. the Rod sections A and B are already completely separated; the rod sections C and D are subjected to permanent deformation been. When the back of the gate caused by the rotary movement of the cutting rollers 11 and 12, the CEDs still reach the area connected rods to tools 21, 22 and 23; by the appropriate arrangement of the lower tool 21 are in Area 21 · the outer rods 51 and 53 pushed apart and thus separated from the central rod 52. With further advancement, the bars 51, 52 and 53 are replaced by the profiles 2I " scraped off and deburred. The other lower tools 22 and the upper tool 23 serve as guides. As you advance the cut bars 5 are guided out of the cutting device on the roller conveyor 32 and in a downstream Station cross-cut to predetermined lengths; Finally, the rod sections get into the (in Fig. 4 marked 7) Cooling zone.

The embodiment described is limited to a cutting process of only two longitudinal cuts; do you want one

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make a larger number of cuts lengthways both the cutting rollers and the number and location of the tools have been adapted accordingly; one wants the dimensions of the cut Change bars, both the cutting rollers and the tools are exchanged.

In Fig. 6, the arrangement is in a schematic representation the various tools explained; "with appropriate dimensioning and arrangement of these tools below and above in the supporting structure, all cutting combinations can be carried out; the tools have the following task in detail:

I - guide bracket,

II - Fülirung bracket, side print on the left,

III - guide holder, side print on the right,

IV - leadership-retention, elements pushing apart,

V - leadership-holding, side print on the left, scraping,

VI - leadership-holding, side pressure on the right, scraping,

VII - leadership-retention, elements pushing apart,

Scrape,

VIII - leadership-holding, side print on the left, scraping,

Deburring,

IX - guide bracket, side pressure right, scraping,

Deburring,

X - guide bracket, pushing apart elements,

Scraping, deburring.

L e r s e i t e

Claims (13)

BLUMBACH · WESER BERGEN · KRAMER ZWIRNER. DEER . BREHM PATENTANWÄLTE IN MUNICH AND WIESBADEN Patentconsult Radeckestraße 43 8000 Munich 60 Telephone (039) 883603/883604 Telex 05-212313 Telegrams Patentconsult Patentconsult Sonnenberger Straße 43 6200 Wiesbaden Telephone (06121) 562943/561998 Telex 04-186237 February 1978 Via Lucio Silla, 59 AN-10 80124 - Napoli / Italia Cutting device for continuous hot cutting of metal bars in their longitudinal direction. 1. Cutting device for multiple, continuous hot cutting of metal catches with a square, in particular rectangular cross-section, which is connected downstream of a continuous caster of a steelworks and / or a rolling mill, characterized in that the cutting device essentially consists of two mechanical, complementary working units, Munich: R. Kramer Dipl.-Inj. . W. Weser Dipl.-Phys. Dr. rer. nat. · P. Hirsch Oipl.-Ing. · H. P. Brehm Dipl.-Chem. Or. Ugh. nal. Wiesbaden: P. G. Slumbdch Dipl.-Ing. · P. Bergen Dipl.-Ing. Dr jur. . G. Zwrner Dipl.-Ing. Dipl.-W.-Ing. 8 υ 9 ö '-:? / 0 9 0 6 wherein the first unit consists of two mechanically driven cutting rollers (11,12), each with grooves (11, 12 ') are provided, the width of which corresponds to the width of the cut bars (5) and whose depth is smaller than the Height of the poles; the grooves (11 ', 12') are with the proviso arranged one above the other that each groove (11 ·, 12 ') of the one The roller cooperates with the groove-free area of the other roller in a form-fitting manner; the total number of grooves (11 ', 12') in the upper and lower sizing rollers correspond to the total number of bars after the cut; the cutting rollers are in one piece formed or can be composed of several parts resulting in the specified profile; the second unit includes one or more lower tools (21,22) and one or more obeve Y / tools (23), their The number is adapted to the number of bars (5) cut; the tools are adapted to the cross-sections of the rods and attached to the sturdy support structure of the facility; the tools are above and below, from the cut rods and serve to guide and hold them as lateral pressure elements and / or as pushing apart elements; individual tools are provided with the profiles (21 "), depending on the Manufacturing needs the sharp edges of the cut bars scrape off or deburr. 2. Cutting device according to claim 1, characterized in that the cutting takes place as a result of the effect of the cutting force in the respective cross-section (or in the respective. ^ uerscrini t: · .- .. b -ι ■} λ y, υ 9 0 6 which through the contact surfaces of the rotating rollers (11, 12) with the (upper or lower) rod area and that of the axes of rotation at the corresponding borders of these surfaces parallel plane is determined, due to the sliding over each other of the two surfaces of this cross-section, which is continuously renewed by the entrainment of the rotating parts, this sliding over one another - that accordingly the vertical plane going through the axes of rotation a complete separation of the greatest starch portion (A, B) of the Rod has caused - at the same time also caused a permanent deformation of the remaining starch portion (C, D), which exclusively through this deformation by means of the appropriately arranged at the exit of the bars from the cutting rollers Tool assembly (21,21 ', 22,23) can be completely separated in a simple manner, which is on the against the appropriately and in a predetermined manner profiled tool (21,21 ') further conveyed rods (51,53) in the horizontal plane exerts a pushing force apart and thereby a slight pulling force in the transverse direction and thus a complete one Separating the rods from each other causes. 3. Cutting device according to claims 1 or 2, characterized in that the cutting rollers (11, 12) can be cooled during operation. 4. Cutting device according to one of claims 1 to 3, characterized in that B υ 98 32/0906 2B05022 the position of the cutting rollers (11, 12) can be adjusted perpendicular to the "pass-line" road opposite that for the conveyor rollers (31) and the exit rollers (32) have a common horizontal plane with regard to the thickness of the bar to be cut (4) to determine and fix, as well as their axes of rotation rotating in opposite directions, around die.genuteten points (11 ', 12') of the rollers (11,12) with the to align non-grooved areas with a positive fit. 5. Cutting device according to one of claims 1 to 4, characterized in that the cutting rollers (11, 12) via mechanical transmission members can be driven by a motor of adequate power. 6. Cutting device according to one of claims 1 to 5 * characterized in that the cutting rollers (11, 12) can be easily mounted from the supporting frame and are interchangeable with other rollers intended for different manufacturing programs. 7. Cutting device according to one of claims 1 to 6, characterized in that di <3 upper and lower position of the tools (21,22,23) with the grooved sections (11 ', 12') and the grooveless sections of the cutting rollers coincide with each tool (21,22,23) being cut off has a predetermined incline towards the ^w pass-line "road. 809832/0906 8. Cutting device according to one of claims 1 to 7 » characterized in that the tools (21) on their front part, on the side opposite the cutting rollers (11, 12) di? Have the shape of a wedge (21 ') in order to push the partially cut rods (51,52, 53) apart so that they are completely separated from one another. 9. Cutting device according to one of claims 1 to 8, characterized in that some tools (21, 22, 23) have profiles (21 ") in order to scrape off and deburr the sharp edges of the cut bars (5). 10. Cutting device according to one of claims 1 to 9, characterized in that the tools (21,22,23) can be cooled during operation. 11. Cutting device according to one of claims 1 to 10, characterized in that a suction device known per se is provided for removing work chips and slag. 12. Cutting device according to one of claims 1 to 11, characterized in that the two mechanical units are attached to a single support frame, the simple and quick assembly and assembly of the cutting rollers (11,12) and the tools (21,22,23) enable ^{Ucht #} 80 9 B`` -i -! OB 13. Cutting device according to one of claims 1 to 12, characterized in that the cutting device downstream of the continuous caster or of the rolling mill or in front of it. an intermediary Rolling mill is arranged, preferably approximately in the middle of the roller conveyors. H Π f)?! :> ? / 0 9 0 f-