Title of Invention

UPSETTING TOOL OF A PAIR OF UPSETTING TOOLS FOR THE DEFORMATION OF CONTINUOUSLY CAST SLABS IN A SLAB UPSETTING PRESS

Abstract ABSTRACT AN UPSETTING TOOL OF AN UPSETTING TOOL PAIR FOR THE DEFORMING OF CONTINUOUSLY CAST SLABS IN A SLAB UPSETTING PRESS AND A METHOD OF OPERATING A SLAB UPSETTING PRESS The present invention relates to an upsetting tool of an upsetting tool pair for the deforming of continuously cast slabs in a slab upsetting press with upsetting shaping surfaces which each load a respective one of the two longitudinal sides surfaces of the slab and which extend parallelly or at an inclination to the direction of movement of the slab and adjoin one another, wherein upsetting shaping surfaces inclined away from the longitudinal side surfaces of the slab are associated with a parallelly extending upsetting shaping surface, in which one or more further upsetting shaping surfaces are arranged behind a first upsetting shaping surface and have angles of inclination which are smaller than the angle of inclination of the first upsetting shaping surface, characterized in that the spacing of the two boundary edges of the first further upsetting shaping surface adjoining the outlet edge of the first upsetting shaping surface as measured on the plane of the parallel upsetting surface is shorter than the spacing of the two boundary edges of the second further upsetting shaping surface adjoining this first further upsetting shaping surface.
Full Text

BACKGROUND BF THE -INVENTION
1. Field of-- the—Invea-fe-ioa
The present invention relates to an upsetting tool of a pair of upsetting tools for the deformation of continuously cast slabs in a slab upsetting press. The support unit of the upsetting tools is composed of two connecting rods which are driven through two eccentric shafts and which support the upsetting tool and guide the upsetting tool in parallel direction. Hinged to the connecting rods is a piston/cylinder unit for producing a movement of the upsetting tool synchronously with the slab movement on the roller table. The upsetting tool has upsetting surfaces for acting on one of the two longitudinal sides of the slab. The upsetting surfaces extend parallel or inclined relative to the direction of movement of the slab or of the longitudinal side surfaces of the slab. The upsetting surfaces are located next to one another so as to form edges extending transversely of the direction of movement of the slab, wherein upsetting surfaces inclined away from the longitudinal side surfaces of the slab are arranged following or possibly in front of an upsetting surface extending parallel to the travel direction of the slab.

2• Description of the Related Art
As described in "Iron and Steel", September 1990, the slabs to be upset are placed on a roller table centrally between two upsetting tools forming a pair and are moved and worked on in such a way that the slabs are subjected to an upsetting flow deformation on their two longitudinal surfaces by the respective upsetting surfaces of the upsetting tools, wherein the slabs are either standing still or are being moved, with a synchronous movement of the upsetting tools taking place transversely of the upsetting pressing direction. The upsetting flow deformation has the result that the slab is pressed in a first processing step into a so-called dog-bone section, as seen from above. The narrow portion of this section is determined with respect to its shape and dimensions by the upsetting surfaces. In the subsequent processing steps, the two upsetting tools are moved apart from each other on the roller table transversely of the travel direction of the slab and the slab is simultaneously moved ahead by a predetermined distance and the wider portion of the dog-bone section reaches the area of those ends of the two oppositely located upsetting surfaces which are located closer to each other. In this position, the slab is once again stopped and the upsetting tools subject the subsequent portions of the slab which have not yet been upset to a continued upsetting flow deformation.

It has already been proposed, to combine the successive deformation steps and the forward movement of the slab, i.e., not to interrupt the forward movement of the slabs and to synchronize the forward movement of the upsetting tools with the speed of movement of the slabs, so that the upsetting . 'tools, while contacting the side walls of the slab, deformed the slab over a predetermined length. After this predetermined length has been travelled, this deformation step and the contact of the upsetting tools with the slab are concluded. Accordingly, the upsetting tools are moved initially together with and then against the travel direction of the slabs towards their respective dead center positions, while the slab is uniformly moved ahead by the subsequent predetermined length.
The upsetting procedures carried out with the above-described upsetting tools make it possible to produce relatively plane side wall surfaces of the slab. However, these upsetting ^procedures frequently produce irregularities in the form of wave-shaped raised areas at the side walls of the slab. These raised areas extend transversely of the longitudinal direction of the side walls and in a more or less regular sequence over the length of the side walls of the slab.

While it has been attempted to counteract the formation of these wave-shaped raised areas by changing the feeding distances and feeding speeds in conjunction with the time sequence of the movements of the upsetting tools and also by using upsetting tools with different angles of inclination of the upsetting surfaces, and while these attempts did reduce these phenomena, the formation of these wave-shaped raised areas could not be completely prevented.

SUMMARY OF THE INVENTION JP-A 63036902 and JP-A 03081005 have disclosed proposals for countering this formation of wave-shaped elevations by arranging following a first inclined upsetting surface one or a plurality of further upsetting surfaces with angles of inclination smaller than the angle of inclination of the first upsetting surface. With this structure of the upsetting tool it was achieved that the aforementioned wave-shaped elevations which clearly appear during the upsetting flow forming primarily in the transition region of the output edge between the upsetting surface and parallel upsetting surfaces are more or less pushed away by the further upsetting surfaces. Practical upsetting operation using upsetting tools constructed in this fashion has shown, however, that the formation of said wave-shaped elevations caused by the respective material condition of the slab to be processed and the upsetting pressure relationships during the upsetting process which depend on their dimensions, cannot be completely and therefore satisfactorily avoided.
The object of the invention is to further develop the upsetting surfaces starting from the afore-mentioned structure and arrangement such that the upsetting flow forming of the side walls of the slab, caused by the upsetting surface sections becoming active one after the other during the upsetting process takes place similar to a rolling process.
The object is solved by the fact that the spacing of the two boundary edges of the first further upsetting surface adjacent to the output edge of the upsetting surface, measured on the plane of the upsetting calibrating surface shorter than the spacing of the two boundary edges of the second further upsetting surface following this first further upsetting surface, measured on the plane of the parallel upsetting surface is shorter than the spacing of the two boundary edges of the second further upsetting surface following this first further upsetting surface.

It has been found during practical use of the configuration according to the present invention that, particularly when the angle of inclination of the first upsetting surface is approximately 11° - 13°, preferably 12°, the angle of inclination of the additional upsetting surfaces should be between 0.5° and 8° if the wave-shaped raised areas are to be eliminated practically without residue. It has been found particularly advantageous if the upsetting tool is dimensioned in such a way that the angle of inclination of the first additional upsetting surface adjacent to the first upsetting surface is 5° and the angle of inclination of the second additional upsetting surface adjacent to the first additional upsetting surface is 1°. It has also been found very advantageous if the angle of inclination of the first additional upsetting surface is 0.5° - 2° and the angle of inclination of the second additional upsetting surface is 4° -8°.
In practical use of the embodiments of the present invention it has been found that, in an embodiment in which three additional upsetting surfaces are provided , the wave-shaped raised areas can be eliminated practically without residue particularly if the angle of inclination of the first upsetting surface is about 19° - 20°, preferably 19.8°, and the angles of inclination of the three additional upsetting surfaces are in a range of between 0.9° and 10°, preferably, 0.91° and 9.8°. It has been found particularly advantageous if the dimensions are selected in such a way that the angle of inclination of the first additional upsetting surface adjacent to the first upsetting surface is 9.1°, the angle of inclination of the second additional upsetting surface adjacent to the first additional upsetting surface is 5.2° and the angle of inclination of the third additional upsetting surface adjacent to the second additional upsetting surface is 0.91° and the parallel upsetting surface adjacent to the third additional upsetting surface is followed by a transition surface having an inclination angle of 12°.

It is also possible, if the first upsetting surface has an angle of inclination of approximately 12°, to provide two additional upsetting surfaces with angles of inclinations of 5.2° and 0.91°, respectively, and to provide a transition surface with an angle of inclination of 12°.
However, the upsetting tools described above still do not provide a satisfactory material flow during upsetting at the slab head and at the slab end. Depending on the reduction, the slab head frequently becomes inclined. This has the result that the width of the slab head is smaller than the width of the slab middle. At the slab end, the material is shaped by the upsetting surface which is appropriately inclined against the direction of movement of the slab. This has the result that the dog bone is shaped differently at the slab head and the slab end as compared to the middle of the slab.
In accordance with another proposal of the present invention, these disadvantages can be eliminated by forming the upsetting surface of the upsetting tool by two or more groups of upsetting surfaces which are each composed of an upsetting surface extending parallel to the travel direction of the slab and upsetting surfaces forming a polygonal configuration with inclination angles of increasing magnitude in front of the parallel upsetting surface in

the direction towards the entry at the pressing gap formed by the upsetting tools. It has been found advantageous to form altogether three groups of such upsetting surfaces. This causes the material flow pattern at the slab head and at the slab end to be much more favorable. The dog bone shape extends more uniformly over the entire- length of the slab.
The upsetting tools having the above-described configuration can be used in a slab upsetting press in such a way that, independently of the respective position of the slab head to the position of the pair of upsetting tools, the slab is moved by means of the roller table towards the pressing gap formed by the pair of upsetting tools and is accelerated before reaching the pressing gap to the precalculated feeding speed and the width of the slab is reduced by the pair of upsetting tools in successive upsetting strokes, wherein the phases of contact between the upsetting tools of the pair of upsetting tools and the slab and the forward movement of- the upsetting tools and the slab take place synchronously.
However, the slab can also be moved by means of the roller table for the first pressing application of the upsetting tools into a precalculated position for the slab head between the upsetting tools. The successive upsetting strokes can be

dimensioned with different lengths while being adapted to the respectively required feeding speed and synchronization of the movements of the slab and the upsetting tools. The different stroke lengths can then be dimensioned in such a way that the contact between the upsetting tools and the slab during the last pressing stroke takes place at a locally prepared location of the upsetting surfaces of the upsetting tools.
Accordingly, the present invention provides an upsetting tool of an upsetting tool pair for the deforming of continuously cast slabs in a slab upsetting press with upsetting shaping surfaces which each load a respective one of the two longitudinal sides surfaces of the slab and which extend parallelly or at an inclination to the direction of movement of the slab and adjoin one another, wherein upsetting shaping surfaces inclined away from the longitudinal side surfaces of the slab are associated with a parallelly extending upsetting shaping surface, in which one or more further upsetting shaping surfaces are arranged behind a first upsetting shaping surface and have angles of inclination which are smaller than the angle of inclination of the first upsetting shaping surface, characterized in that the spacing of the two boundary edges of the first further upsetting shaping surface adjoining the outlet edge of the first upsetting shaping surface as measured on the plane of the parallel upsetting surface is shorter than the spacing of the two boundary edges of the second further upsetting shaping surface adjoining this first further upsetting shaping surface.
Accordingly, the present invention further provides a method of operating a slab upsetting press having a pair of upsetting tools for deforming continuously cast slabs, the pair of upsetting tools forming a pressing gap, a support unit for the upsetting tools being composed of two connecting rods, the connecting rods being driven through two eccentric shafts, the connecting rods supporting the upsetting tools and guiding the upsetting tools in a parallel direction, a piston/cylinder unit for producing a movement

of the upsetting tools synchronously with a slab movement on a roller table being hinged to the connecting rods, each upsetting tool having at least two groups of upsetting surfaces, each group of upsetting surfaces comprising a parallel upsetting surface extending in travel direction of the slab, and inclined upsetting surfaces in front of each parallel upsetting surface, wherein the inclined upsetting surfaces form a polygonal configuration, and wherein the angles of inclination of the additional upsetting surfaces increase against the travel direction of the slab, the method comprising, after the slab having entered the pressing gap formed by the upsetting tools, carrying out a first upsetting stroke by applying a first group of the three groups of upsetting surfaces against side surfaces of the slab, carrying out a second upsetting stroke by applying the first and a second group of the three groups of upsetting surfaces against the side surfaces of the slab, and carrying out a third upsetting stroke by applying the three groups of upsetting surfaces against the side surfaces of the slab.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, specific objects attained by its use, reference should be had to the drawing and descriptive manner in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a top view of an upsetting tool;
Figs. 2, 3 and 4 are top views, similar to Fig. 1, of other embodiments of the upsetting tool;
Fig. 5 is a top view of yet another embodiment of the upsetting tool; and
Figs. 6-11 schematically show a pair of the upsetting tool of Fig. 5 in different positions during the upsetting procedures.

DESCRIPTION OF THE PREFERRED EMBODIMENT
As illustrated in Fig. 1 of the drawing, a part 1 of a pair of upsetting tools has a first upsetting surface la and an upsetting surface lb extending parallel to the travel direction of the slab. The first upsetting surface la extends at an angle of inclination a relative to the plane x-x of the parallel upsetting surface lb. Additional upsetting surfaces la' and la' ' are arranged following the transition edge AK of the first upsetting surface la. These two additional upsetting surfaces la' and la' ' extend at angles of inclination oil and OL2 , respectively, relative to the plane x-x of the parallel upsetting surface lb which are smaller than the angle of inclination a. of the first upsetting surface relative to the plane x-x. As can be seen in Fig. 1, in the illustrated embodiment, the distance LI between the two transition edges of the first additional upsetting surface la' following the first upsetting surface la, i.e., the transition edges AK and the intermediate edge ZK, as measured on the plane x-x of the parallel upsetting surface lb, is shorter than the distance L2 between the two transition edges of the second additional upsetting surface la' following the first additional upsetting surface la', i.e., the intermediate edge ZK and the end transition edge EK. In the illustrated embodiment, the distance LI between the transition edges AK and ZK of the first additional upsetting surface la' is

approximately half of the distance L2 between the transition edges ZK and EK of the second additional upsetting surface la' ' . The length L3 of the parallel upsetting surface lb measured between the end transition edge EK of the second additional upsetting surface la' ' and the free transition A of this parallel upsetting surface lb is * approximately one third of the length of the parallel upsetting surface of a comparable upsetting tool having only one upsetting surface whose transition edge position is indicated on a dash-dot line with AK'.
The vertical distance a of the transition edge AK from the plane x-x of the parallel upsetting surface lb can be dimensioned in such a way that it corresponds approximately to the height of the side wall deformation, not shown, which is produced during upsetting pressing of a slab with an upsetting tool which has an upsetting surface whose transition edge assumes the above-described position AK'.
The upsetting tool illustrated in Fig. 1 is manufactured by removing material from an upsetting tool having only one upsetting surface and the resulting above-described position of the transition edge AK' in such a way that the transition edge AK of the first upsetting surface la is moved into an area in front of and above its original position AK' and the length of the parallel

upsetting calibrating surface lb is reduced to the above-mentioned cne third of its original length.
The one part 1 of a pair of upsetting tools illustrated in Fig. 2 has a first upsetting surface la and- a parallel upsetting surface lb. The first upsetting surface la extends at an angle of inclination a relative to the plane x-x of the parallel upsetting surface lb. The additional upsetting surfaces la' and la' are arranged following the transition edge AK of the first upsetting surface la. These two additional upsetting surfaces la' and la' extend at angles of inclination al and a2 relative to the plane x-x . of the parallel upsetting 'surface lb which are smaller than the angle of inclination a of the first upsetting surface la relative to the plane x-x.
The upsetting tool illustrated in Fig. 3 has a first upsetting surface la which extends at an angle of inclination a relative to the plane x-x in which the parallel upsetting surface lb is located. Arranged following the transition edge AK of the first upsetting surface la are additional upsetting surfaces la', la' and la''. These additional upsetting surfaces extend at angles of inclination a' , a' ' and a' ' ' relative to the plane x-x. The angles of inclination are smaller than the angle of inclination & of the first upsetting surface la relative to the plane x-x. The last of

the additional upsetting surfaces la' ' ' is followed by the parallel upsetting surface lb and the upsetting surface lb is followed by the inclined upsetting surface lc having an angle of inclination S.
The configuration of the upsetting tool 1 illustrated in Fig. 4 corresponds to the configuration of Fig. 3 except that only two additional upsetting surfaces la' and la' follow the first upsetting surface la.
As illustrated in Fig. 5 of the drawing, the upsetting tool WZ has a plurality of upsetting surfaces a-k whose purpose .' is to act on the side surface SF of the slab BR shown in dash-dot lines during the movement of the upsetting tool WZ in the direction of arrow P. The portion of the upsetting surface which contacts the • side surface SF first during this movement of the upsetting tool WZ is the upsetting surface a which extends parallel to the direction of movement B of the slab BR; in this embodiment, two inclined upsetting surfaces b, c are arranged in front of the upsetting surface a so as to form a type of polygonal configuration. The angle of inclination otl of the surface b is smaller than the angle of inclination o;2 of the surface c.
On the free side of the parallel upsetting surface a of this first group of upsetting surfaces a, b, c follow a second group of

upsetting surfaces which, in a stepped relationship relative to the first group, also is composed of a parallel upsetting surface d and inclined upsetting surfaces e, "f arranged in front of the upsetting surface d so as to form a polygonal configuration, wherein the
angle of inclination a3 of the upsetting surface -e is also smaller
. (i. ■>■>
than the angle of inclination a4 of the upsetting surface f. The
third and last group of these upsetting surfaces also have a
it »
parallel upsetting surface g and a polygonal configuration of
inclined upsetting surfaces h, i, k'with angles of inclination a5, ot6, al arranged in front of the parallel upsetting surface g.
As is apparent in the illustrated embodiment, in the three
groups of upsetting surfaces a, b, c,- d, e, f and g, h, i, k, the
it "
inclined upsetting surface h of the third group and the two
parallel upsetting surface a and d of the first and second groups have the same lengths m2, m5 and m8 as measured in the direction of movement of the slab. Also, the length ml of the parallel upsetting surface g of the third group is equal to the sum of the lengths m3 + m4 of the upsetting surfaces i and k of this third group and to the sum of the lengths m6 + m7 of the inclined upsetting surfaces e and f of the second group.
The aforementioned lengths can also be dimensioned and

distributed differently depending on the operational requirements and experiences.
Figs. 6-11 illustrate the manner of operation of the upsetting tools WZ1 and WZ2 of the pair of upsetting tools against the two side surfaces SF1 and SF2 of the slab BR. Fig. 6 shows the pressing gap SP formed by the upsetting tools WZ1 and WZ2 and the head of the slab BR which is being transported by a roller table, not shown. During the further transport in the direction toward the pressing gap SP, the slab head is positioned in such a way that the front edge VK is located approximately below the middle of the parallel upsetting surface *a' of the first group of upsetting surfaces. The upsetting tools WZl and WZ2 then carry out a first upsetting stroke towardseach other and upset the slab head into the shape illustrated in Fig. 7. This is effected by applying all upsetting surfaces a, b, c of the first group of upsetting surfaces against the side surfaces SFl and SF2 of the slab. Subsequently, the two upsetting tools WZl and WZ2 are moved apart from each other and the slab head is advanced into a position in which the front edge of the slab head is located approximately below the middle cf the following parallel upsetting surfaces d of the second group cf upsetting surfaces. By carrying out a subsequent second upsetting stroke, the slab head is formed into the shape illustrated in Fig. 8 by a simultaneous application of the upsetting surfaces d, e, f

of the second group of upsetting surfaces and the upsetting
a it u. >j w ■>>
surfaces a, b, c of the first group of upsetting, surfaces against
the side surfaces SF1 and SF2 of the slab. Subsequently, after once again opening the pressing gap SP, the front edge VK of the slab head is moved approximately underneath the middle of the parallel upsetting surfaces "*g of the third group of upsetting surfaces and during the following upsetting stroke, all upsetting surfaces g, h, i, k; d, e, f and a, b, c of the third, second and first group of the upsetting surfaces act against the side surfaces SF1 and SF2 of the slab head and produce the shape illustrated in Fig. 9. As a result of these three upsetting strokes, the width of the slab head is reduced to the intended magnitude as shown in Fig. 10, and the remaining length of the slab which is not yet deformed is reduced in the same manner during additional upsetting strokes. As shown in Fig. 11, the slab BR is then moved out of the pressing gap SP.
While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.


WE CLAIM:
1. An upsetting tool of an upsetting tool pair for the deforming of continuously cast slabs in a slab upsetting press with upsetting shaping surfaces which each load a respective one of the two longitudinal sides surfaces of the slab and which extend parallelly or at an inclination to the direction of movement of the slab and adjoin one another, wherein upsetting shaping surfaces inclined away from the longitudinal side surfaces of the slab are associated with a parallelly extending upsetting shaping surface, in which one or more further upsetting shaping surfaces (la', la") are arranged behind a first upsetting shaping surface (la) and have angles of inclination (al; a2) which are smaller than the angle of inclination (a ) of the first upsetting shaping surface (la), characterized in that the spacing (LI) of the two boundary edges (AK, ZK) of the first further upsetting shaping surface (la') adjoining the outlet edge (AK) of the first upsetting shaping surface (la) as measured on the plane (x-x) of the parallel upsetting surface (lb) is shorter than the spacing (L2) of the two boundary edges (ZK, EK) of the second further upsetting shaping surface adjoining this first further upsetting shaping surface (la').
2. The upsetting tool according to claim 1, wherein the spacing (LI) of the boundary edges (AK, ZK) of the first further upsetting shaping surface (la') corresponds to about half the spacing of the boundary edges (ZK, EK) of the second further upsetting shaping surface.
3. The upsetting tool according to claim 1, wherein the case of dimensioning of the angle of inclination (a) of the first upsetting shaping surface (la) at 11 to 13° and arrangement of two further upsetting shaping surfaces (la' and la") arranged after these the angle of inclination thereof is dimensioned at about 0.5 to 8°.

4. The upsetting tool according to claim 3, wherein the angle of inclination (a') of the further upsetting shaping surface (la') abutting the first upsetting shaping surface (la) is dimensioned at 4 to 8° and the angle of inclination (a") of the further upsetting shaping surface (la") adjoining this is dimensioned at 0.5 to 2°.
5. The upsetting tool according to claim 4, wherein the angle of inclination (a') of the further upsetting shaping surface (la') adjoining the first upsetting shaping surface (la) amounts to 5° and the angle of inclination (a") of the further upsetting shaping surface (la") adjoining this amounts to 1°.
6. The upsetting tool according to claim 1, wherein in the case of dimensioning of the angle of inclination (a) of the first upsetting shaping surface (la) at about 19 to 20°, preferably 19.8°, and arrangement of three further upsetting shaping surfaces (la', la" and la'") arranged after these the angle of inclination thereof is dimensioned at about 0.9 to 10°, preferably 0.91 to 19.8°, and an exit surface (lc) with an angle of inclination (P) of 12° adjoins the further upsetting calibrating surface (lb) following these.
7. The upsetting tool according to claim 6, wherein the angle of inclination (al) of the further upsetting shaping surface (la') abutting the first upsetting shaping surface (la) is dimensioned at 9.1°, the angle of inclination (a") of the further upsetting shaping surface (la") arranged after this is dimensioned at 5.2° and the angle of inclination (a'") of the adjoining transition shaping surface (la'") is dimensioned at 0.91°.
8. The upsetting tool according to claim 7, wherein the angle of inclination of the first upsetting shaping surface (la) amounts to 12°, the further upsetting shaping surface (la') following this amounts to 5.2° and the further upsetting shaping surface (la") adjoining this amount to 9.1°.

9. The upsetting tool according to claim 1, wherein two and more groups of upsetting shaping surfaces, which each consists of a parallelly extending upsetting shaping surface (a;d; g) and upsetting shaping surfaces (b, c; e, f; h, i, k), which are arranged inclined in direction towards the inlet of the press gap (SP) formed by the upsetting tools (WZ1; WZ2) and in front of this upsetting shaping surface (a; d; g) and which form a kind of polygon train, with angles of inclination of increasing size from the upsetting shaping surface of the upsetting tool (WZ1; WZ2).
10. The upsetting tool according to claim 9, wherein the upsetting shaping surface of the upsetting tool (WZ1; WZ2) is formed from in total three groups of upsetting shaping surfaces.
11. The upsetting tool according to claim 10, wherein the case of the three groups of upsetting shaping surfaces (a, b, c; d, e, f; g, h, i, k;) the inclined upsetting shaping surface (h) of the third group and the two parallelly extending upsetting shaping surfaces (a; d) of the first and second group have the same length (m2; m5; m8) measured over the direction of movement of the slab (BR), and the parallelly extending upsetting surface (g) of the third group as well as the inclined upsetting shaping surfaces (e, f) of the second group are equal amongst one another by length (ml, m3 + m4 and m6 + m7).
12. The upsetting tool according to claims 10 and 11, wherein the last inclined upsetting shaping surface ( C ) of the first group is dimensioned to be longer by a small amount (mlO) than the length (ml and m4) of the last inclined upsetting shaping surfaces (k and f) of the third and the second group.
13. The upsetting tool according to claims 11 and 12, wherein the sizes of the angle of inclination of the last inclined upsetting shaping surface of the first and second and third group are dimensioned between 23° and 20°, preferably 22.18°, 23.63° and 20.56°, and those of the first or second inclined upsetting shaping surfaces of these groups are dimensioned between 8° and 12.1°, preferably 8.13°, 12.09° and 8.13°, and

those of the first inclined upsetting shaping surface of the last group are dimensioned at about 2.0° to 3.0°, preferably 3.29°.
14. The upsetting tool according to any one of claims 11 to 13, wherein an inclined exit surface (g') is arranged after the parallel upsetting surface (g) of the last group.
15. The upsetting tool according to claim 14, wherein the angle of inclination of the exit surface (g') amounts to 12° to 13°, preferably 12.09°.
16. Use of upsetting tools according to one of claims 9 to 15 in a slab upsetting press, in which the support of the upsetting tools which is driven by way of two eccentric shafts, with two piston rods which support and parallelly guide the upsetting tool and to which is pivotably connected a piston-cylinder unit for generation of a movement of the upsetting tool running synchronously to the slab movement of the roller path, wherein the side surfaces (SF1 and SF2) of the slab (BR) after entry thereof into the press gap (SP) formed by the upsetting tools (WZ1 and WZ2) and passage therethrough are acted on the first upsetting stroke by the first group of upsetting shaping surfaces (a, b, c) in the following second upsetting stroke by the second group of upsetting shaping surfaces (d, e, f) and those of the first group and in the third upsetting stroke by the third group of upsetting surfaces (g, h, i, k) together with those of the two preceding groups.
17. A method according to claim 16, wherein the slab (BR) independently of the respective position relative to the position of the upsetting tool (WZ1, WZ2) is moved towards the press gap (SP) formed by that, is brought to a pre-calculated speed of advance and is reduced in width in the successive upsetting strokes, wherein the contact phases between upsetting tools (WZ1 and WZ2) and slab (BR) run synchronously in movement.
18. The method according to claim 16, wherein the slab (BR) for the first upsetting stroke is moved into a pre-calculated position of the slab head between the upsetting

tools (WZ1, WZ2), and the successive upsetting strokes take place with matching of the respectively required speed of advance and synchronization of the upsetting tool speed for variable stroke lengths.
19. The upsetting tool according to claim 1, comprising two additional upsetting surfaces, wherein the first upsetting surface has an angle of inclination of 11° to 13° and the two additional upsetting surfaces have angles of inclination of about 0.5° to 8°.
20. The upsetting tool according to claim 19, wherein the angle of inclination of the first additional upsetting surface following the first upsetting surface in travel direction of the slab is 4° to 8° and the angle of inclination of the second additional upsetting surface following the first additional upsetting surface is 0.5° to 2°.
21. The upsetting tool according to claim 20, wherein the angle of inclination of the first additional upsetting surface is 5° and the angle of inclination of the second additional upsetting surface is 1°.
22. The upsetting tool according to claim 1, comprising three additional upsetting surfaces, wherein the angle of inclination of the first upsetting surface is about 19° to 20°, and the three additional upsetting surfaces each have an angle of inclination of about 0.9° to 10°.
23. The upsetting tool according to claim 22, wherein the angle of inclination of the first upsetting surface is 19.8° and the angle of inclination of each additional upsetting surface is 0.91° to 9.8°.
24. The upsetting tool according to claim 22, wherein a first of the three additional upsetting surfaces arranged following the first upsetting surface in travel direction of the slab has an angle of inclination of 9.1°, a second of the three additional upsetting surfaces following the first additional upsetting surface having an angle of inclination

of 5.2° and a third of the three additional upsetting surfaces following the second additional upsetting surface having an angle of inclination of 0.91°.
25. The upsetting tool according to claim 24, wherein the first upsetting surface has an angle of inclination of 12°, the first additional upsetting surface has an angle of inclination of 5.2° and the second additional upsetting surface has an angle of inclination of 9.1°.
26. The upsetting tool according to claim 1, comprising at least two groups of upsetting surfaces, each group of upsetting surfaces comprising a parallel upsetting surface extending in travel direction of the slab, and inclined upsetting surfaces in front of each parallel upsetting surface, wherein the inclined upsetting surfaces form a polygonal configuration, and wherein the angles of inclination of the additional upsetting surfaces increase against the travel direction of the slab.
27. The upsetting tool according to claim 26, wherein the upsetting tool comprises three groups of upsetting surfaces.
28. The upsetting tool according to claim 27, wherein the three groups of upsetting surfaces has a first group, a second group and a third group arranged one behind the other in travel direction of the slab, wherein a first of the inclined upsetting surfaces of the third group arranged in front of the parallel upsetting surface and the parallel upsetting surfaces of the first and second group are of equal length, and wherein the length of the parallel upsetting surface of the third group is equal to a sum of the lengths of the inclined upsetting surfaces of the third group and to a sum of the lengths of the inclined upsetting surfaces of the second group.
29. The upsetting tool according to claim 28, wherein a last inclined upsetting surface of the first group is slightly longer than the length of a last inclined surface of the third group and than a last inclined upsetting surface of the second group.

30. The upsetting tool according to claim 29, wherein the angles of inclination of the last inclined upsetting surface of the first, second and third groups are between 23° and 20°, the angles of inclination of the first and second inclined upsetting surfaces of the first, second and third group are between 8° and 12.1°, and the angle of inclination of the first inclined upsetting surface of the last group is about 2.0° to 3.0°.
31. The upsetting tool according to claim 30, wherein the angle of inclination of the last inclined upsetting surface of the first group is 22.18°, the angle of inclination of the last inclined upsetting surface of the second group is 23.63° and the angle of inclination of the last inclined upsetting surface of the third group is 20.56°, the angle of inclination of the second and third inclined upsetting surfaces of the first group is 8.13°, the angle of inclination of the first and second inclined upsetting surfaces of the second group is 12.09° and the angle of the first and second inclined upsetting surfaces of the third group is 8.13°, and the angle of inclination of the first inclined upsetting surface of the last group is 2.29°.
32. The upsetting tool according to claim 27, wherein an inclined transition surface is arranged following the parallel upsetting surface of the last group of the three groups of upsetting surfaces.
33. The upsetting tool according to claim 32, wherein the transition surface has an angle of inclination of about 12° to 13°.
34. The upsetting tool according to claim 33, wherein the transition surface has an angle of inclination of 12.09°.
35. A method of operating a slab upsetting press having a pair of upsetting tools for deforming continuously cast slabs, the pair of upsetting tools forming a pressing gap, a support unit for the upsetting tools being composed of two connecting rods, the connecting rods being driven through two eccentric shafts, the connecting rods supporting the upsetting tools and guiding the upsetting tools in a parallel direction, a

piston/cylinder unit for producing a movement of the upsetting tools synchronously with a slab movement on a roller table being hinged to the connecting rods, each upsetting tool having at least two groups of upsetting surfaces, each group of upsetting surfaces comprising a parallel upsetting surface extending in travel direction of the slab, and inclined upsetting surfaces in front of each parallel upsetting surface, wherein the inclined upsetting surfaces form a polygonal configuration, and wherein the angles of inclination of the additional upsetting surfaces increase against the travel direction of the slab, the method comprising, after the slab having entered the pressing gap formed by the upsetting tools, carrying out a first upsetting stroke by applying a first group of the three groups of upsetting surfaces against side surfaces of the slab, carrying out a second upsetting stroke by applying the first and a second group of the three groups of upsetting surfaces against the side surfaces of the slab, and carrying out a third upsetting stroke by applying the three groups of upsetting surfaces against the side surfaces of the slab.
36. The method according to claim 35, comprising moving the slab independently of a position of the slab relative to a position of the upsetting tools toward the pressing gap, accelerating the slab to a precalculated feeding speed and reducing a width of the slab by the first, second and third upsetting strokes, wherein phases of contact between the upsetting tools and the slab are carried out synchronously.
37. The method according to claim 35, comprising moving the slab for the first upsetting stroke into a precalculated position of a head of the slab between the upsetting tools, and carrying out the successive upsetting strokes with variable feeding lengths adapted to the required feeding speed and synchronized with the speed of the upsetting tools.
38. An upsetting tool of an upsetting tool pair for the deforming of continuously cast slabs in a slab upsetting press, substantially as herein described with reference to the accompanying drawings.

39. A method of operating a slab upsetting press, substantially as herein described with reference to the accompanying drawings.


Documents:

1273-mas-1996 abstract duplicate.pdf

1273-mas-1996 abstract.pdf

1273-mas-1996 claims duplicate.pdf

1273-mas-1996 claims.pdf

1273-mas-1996 correspondence others.pdf

1273-mas-1996 correspondence po.pdf

1273-mas-1996 description (complete) duplicate.pdf

1273-mas-1996 description (complete).pdf

1273-mas-1996 drawings duplicate.pdf

1273-mas-1996 drawings.pdf

1273-mas-1996 form-2.pdf

1273-mas-1996 form-26.pdf

1273-mas-1996 form-4.pdf

1273-mas-1996 form-6.pdf

1273-mas-1996 others.pdf

1273-mas-1996 petition.pdf


Patent Number 198028
Indian Patent Application Number 1273/MAS/1996
PG Journal Number 30/2009
Publication Date 24-Jul-2009
Grant Date 17-Jan-2006
Date of Filing 18-Jul-1996
Name of Patentee M/S. SMS SCHLOEMANN-SIEMAG AKTIENGESELLSCHAFT
Applicant Address EDUARD-SCHLOEMANN-STRASSE 4, 40237 DUSSELDORF
Inventors:
# Inventor's Name Inventor's Address
1 GERHARD HEITZE WIESENSTRASSE 46, 57250 NETPHEN
2 ADOLF MULLER HOHSTRASSE 18, 57234 WILNSDORF
3 GUNTER KNEPPE THEODOR-HEUSS-STRASSE 11, 57271, HILCHENBACH
PCT International Classification Number N/A
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 19526279.4 1995-07-19 Germany