GB2163572A - A method of, and an apparatus for, sub-dividing and cropping tubular or rod-shaped work- material - Google Patents
A method of, and an apparatus for, sub-dividing and cropping tubular or rod-shaped work- material Download PDFInfo
- Publication number
- GB2163572A GB2163572A GB08521008A GB8521008A GB2163572A GB 2163572 A GB2163572 A GB 2163572A GB 08521008 A GB08521008 A GB 08521008A GB 8521008 A GB8521008 A GB 8521008A GB 2163572 A GB2163572 A GB 2163572A
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- GB
- United Kingdom
- Prior art keywords
- work
- rolling
- length
- sub
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D36/00—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut
- B23D36/0008—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices
- B23D36/0033—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices for obtaining pieces of a predetermined length
- B23D36/0058—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut for machines with only one cutting, sawing, or shearing devices for obtaining pieces of a predetermined length the tool stopping for a considerable time after each cutting operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/12—End of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Tubular or rod-shaped work material are sub-divided and cropped without residual ends or offcuts downstream of one or a plurality of rolling lines (1,3) disposed one behind the other, by means of a separating device (5) adjustable to different cut length values, the leading portion of the length of each finish-rolled piece of work-material being sub-divided into desired fixed lengths or integral multiples thereof, and only the trailing portion of the length being sub-divided only into similar lengths thereof in a known manner without offcuts. The length of the trailing portion of the length which is to be sub-divided without residual ends and, possibly, to be cropped, is ascertained in good time in accordance with the invention, control points comprising, for example, photocells (6, 8, 11), and speed indicators (7, 9, 12) are disposed at suitable locations, and the anticipated length of the trailing portion of the length being determined from measurements of time and speed before it has actually been produced. <IMAGE>
Description
tocell disposed at a second control point downstream of the last stand of the rolling line or lines, and a speed indicator for the emerging work-material disposed in the region of the second control point, the photocells and the speed indicator being connected to a computing and control unit for signalling the length of the trailing portion of the work-material and the value of the lengths into which it is to be cut without offcuts and for signalling the commencement of the division into cut lengths of such value.
The apparatus components may themselves be known, so that only their suggested use and the nature of their correlation or co-ordination are the subject of the invention.
It has proved to be advantageous to dispose a speed indicator upstream of the first rolling stand of the first or each rolling line. By means of these devices at these locations, any changes occurring in the rolling speed during the measuring period are immediately ascertained and lead to the correction of the result by- automatic input into the computing unit. The measuring period refers to the period of time elapsing between the leading end of the work-material passing the first and the second control points. If changes in speed occur during this short period of time they would, if they were not taken into account, lead to falsification of the result when calculating the length of the trailing portion of the work-material, this being avoided by the aforesaid measures.
The invention is further described, by way of example, with reference to the accompanying drawing, which is a diagrammatic representation of the sub-dividing method and apparatus of the invention.
Tubular or rod-shaped work-material coming as stock material from the direction of the arrow X enter a rolling block 1 whose rolling stands are driven by a drive 2 which conventionally comprises a motor and transmission.
A second rolling block 3 and its drive 4 is disposed downstream of the rolling block 1 and is followed by a separating or parting device 5 which may be shears, a saw or a cutting disc and is therefore only shown in the form of a symbol. A photocell 6 and a speed indicator 7 are disposed between the second rolling block 3 and the shears 5. The sequence of photocell 6 and speed indicator 7 may be transposed. The same arrangement, that is to say, a photocell 8, a speed indicator 9 and shears 10 are located between the rolling blocks 1 and 3. Here also, the sequence of photocell 8 and speed indicator 9 may be transposed. A further photocell 11 is disposed upstream of the first rolling stand of the rolling block 1. The upstream distance may be substantially greater than that shown. In order to elucidate this, the same photocell 11 is shown again in dash-dot lines further to the left.
The stock material coming from the direction of the arrow X is first fed to the rolling block 1. The leading end of the work-material is first registered by the photocell 11 and by the photocell 8 shortly thereafter when it has left the last rolling stand of the rolling block 3.
The time taken for the leading end of the work-material to travel from the photocell 11 to the photocell 6 is recorded by the computing and control unit (not illustrated). Furthermore, the computing and control unit receives the speed of the finish-rolled work-material from the speed indicator 7 at virtually the same time. The leading portion of the length of the finish-rolled work-material is sub-divided by the separating device 5 into the desired fixed lengths or integral multiples thereof, corresponding to the setting of the separating device 5 to a cut length value which was input previously and which can be largely freely selected.
The operating state described above changes only at the instant at which the trailing end of the stock material reaches the photocell 11 upstream of the first rolling block 1.
The work-material then still located in the plant between the photocell 8 and the photocell 11 forms the trailing portion of the length of the work-material which, of course, is still not entirely rolled out, so that it still does not have its final length. However, the computing and control unit already knows accurately from multiplication, which is performed upon entry of the work-material, of the speed by the time t, required by the leading end of the piece of work-material to travel from the photocell 11 to the photocell 8 the actual finish-rolled length of the trailing end portion still to be anticipated by the photocell 6 from the instant at which the photocell 11 signals the leading end of the work-material.Hence, the distance a between the two photocells 6 and 11 is not equal to the length of the trailing portion of the finish-rolled piece of work-material, but only corresponds to this, since the work-material is still in the rolling blocks 1 and 3 where its cross section is still being reduced and consequently where it is also being corespondingly elongated, so that, when it is in its finish-rolled state downstream of the rolling block 3, it is substantially longer than the distance a between the two photocells 6 and 11.
However, multiplication of the speed V1 (measured by the speed indicator 7) by the time t, accurately gives the length L1 of the trailing portion of the finish-rolled piece of work-material. The length L1 of the trailing portion can be varied by shifting the photocell 11, if this is advantageous with regard to sub-division without residual ends or offcuts.
In practice, the length L1 of the finish-rolled trailing portion which results from the not yet finish-rolled remaining work-material between the photocell 6 and the photocell 11, does not yet constitute the entire length of the trail scale which falls from the work-material in the rolling line or rolling lines is not taken into account. Moreover, a fresh input has to be made manually upon each change in the cross section of the work-material and in the specific weight, this being a complicated matter.
Finally, accurately pre-selected fixed lengths of the work-material do not result with the known method, but only cut lengths which vary in value from one piece of work-material to another in dependence upon the stock material. This known solution does not take into account the severing of unserviceable end portions, also called "cropping".
An object of the invention is to provide a method and an apparatus by which it is possible automatically to divide even longer portions without residual ends and to crop them accurately with particularly low expenditure on apparatus, with great accuracy and small spatial requirements.
In accordance with the invention, there is provided a method of sub-dividing tubular or rod-shaped work-material downstream of one or a plurality of rolling lines disposed one behind the other, by means of a separating device adjustable to variable cut length values, in which the leading portion of each finish-rolled piece of work-material is sub-divided into desired fixed lengths or integral multiples thereof, and the trailing portion of each finishrolled piece is sub-divided into lengths which are only similar to one another and without producing any offcuts, the length of the trailing portion of the finish-rolled piece being ascertained from the measured speed of the work-material multiplied by the period of time between the passing of a first control point upstream of the rolling line or rolling lines and the passing of a second central point downstream of the rolling line or rolling lines by the leading end of the work-material, and in which the dividing of the trailing portion of the finishrolled workpiece without offcuts commences when the trailing end of the work-material passes the first control point.
This in the first instance results in a relatively large number of desired fixed lengths or of integral multiples thereof which form the preferred product and are particularly advantageous for further processing and for sale.
Utilizing one of the known methods, only the trailing portion of the work material is cut into different lengths but these should not be considerably shorter than the fixed lengths into which the leading portion is sub-divided, so that only a smaller number of cut lengths are generally obtained which differ from the desired fixed lengths or their integral multiples.
The length of the trailing portion of the workmaterial and hence the number of cut lengths resulting from sub-division without residual ends or offcuts is chiefly dependent upon the distance between the first and the second control points. Since a control point of a kind, such as a photocell, only takes up a small amount of space, it can be disposed at a wide variety of locations, so that one has a wide choice in determining the size of the leading and the trailing portions of the pieces of elongate work-material. The expenditure on apparatus is low owing to the omission of the balance and the use of simple photocells which, for example, may be replaced by switches or pulse generators of various kinds.Furthermore, the space required for performing the method in accordance with the invention is no greater than that which would be required by rolling lines having a separating device disposed downstream, even with the simplest construction, that is to say, without subdivision without offcuts or residual ends. At the same time, great accuracy in assessing the overall length of the piece of rolled workmaterial is achieved, since, in accordance with the invention, instead of the weights which can only be ascertained inaccurately, accurate time measurement is performed at the control points, together with the accurately known distance between the two control points which is normally established once and for all during construction of the plant and which is generally retained. The speed and time measurements in accordance with the invention can be performed relatively simply and accurately.The result cannot be falsified by the dropping of scale from the work-material. Furthermore, the method in accordance with the invention operates automatically and no reset or adjustment is required, even with a change of work program. Even the fitting or removal of individual rolling stands from the rolling line or rolling lines does not require any conversion. There is no need to input data relating to cross sections or specific weights. A further substantial advantage resides in the fact that it is possible to crop the leading and/or trailing end of the work-material to any length when carrying out the method in accordance with the invention. The length of crop is determined empirically in accordance with the nature of the work-material and the rolling line. Since, with the method in accordance with the invention, the length of the trailing portion of the work-material is already known before it is rolled out, and the length of crop is fixedly preselected, the point of separation for the crop cut is also known. This limits downstream the part of the trailing portion of the work-material which is to be divided without residual ends.
The invention includes apparatus for rolling and sub-dividing tubular rod-shaped work-material comprising one or a plurality of rolling lines disposed one behind the other and at least one separating device having a variable cut length value disposed downstream of the said rolling line or lines, a photocell disposed at a first control point upstream of the first stand of the rolling line or lines, a further pho tocell disposed at a second control point downstream of the last stand of the rolling line or lines, and a speed indicator for the emerging work-material disposed in the region of the second control point, the photocells and the speed indicator being connected to a computing and control unit for signalling the length of the trailing portion of the work-material and the value of the lengths into which it is to be cut without offcuts and for signalling the commencement of the division into cut lengths of such value.
The apparatus components may themselves be known, so that only their suggested- use and the nature of their correlation or co-ordination are the subject of the invention.
It has proved to be advantageous to dispose a speed indicator upstream of the first rolling stand of the first or each rolling line. By means of these devices at these locations, any changes occurring in the rolling speed during the measuring period are immediately ascertained and lead to the correction of the result by automatic input into the computing unit. The measuring period refers to the period of time elapsing between the leading end of the work-material passing the first and the second control points. If changes in speed occur during this short period of time they would, if they were not taken into account, lead to falsification of the result when calculating the length of the trailing portion of the work-material, this being avoided by the aforesaid measures.
The invention is further described, by way of example, with reference to the accompanying drawing, which is a diagrammatic representation of the sub-dividing method and apparatus of the invention.
Tubular or rod-shaped work-material coming as stock material from the direction of the arrow X enter a rolling block 1 whose rolling stands are driven by a drive 2 which conventionally comprises a motor and transmission.
A second rolling block 3 and its drive 4 is disposed downstream of the rolling block 1 and is followed by a separating or parting device 5 which may be shears, a saw or a cutting disc and is therefore only shown in the form of a symbol. A photocell 6 and a speed indicator 7 are disposed between the second rolling block 3 and the shears 5. The sequence of photocell 6 and speed indicator 7 may be transposed. The same arrangement, that is to say, a photocell 8, a speed indicator 9 and shears 10 are located between the rolling blocks 1 and 3. Here also, the sequence of photocell 8 and speed indicator 9 may be transposed. A further photocell 11 is disposed upstream of the first rolling stand of the rolling. block 1. The upstream distance may be substantially greater than that shown. In order to elucidate this, the same photocell 11 is shown again in dash-dot lines further to the left.
The stock material coming from the direction of the arrow X is first fed to the rolling block 1. The leading end of the work-material is first registered by the photocell 11 and by the photocell 8 shortly thereafter when it has left the last rolling stand of the rolling block 3.
The time taken for the leading end of the work-material to travel from the photocell 11 to the photocell 6 is recorded by the computing and control unit (not illustrated). Furthermore, the computing and control unit receives the speed of the finish-rolled work-material from the speed indicator 7 at virtually the same time. The leading portion of the length of the finish-rolled work-material is sub-divided by the separating device 5 into the desired fixed lengths or integral multiples thereof, corresponding to the setting of the separating device 5 to a cut length value which was input previously and which can be largely freely selected.
The operating state described above changes only at the instant at which the trailing end of the stock material reaches the photocell 11 upstream of the first rolling block 1.
The work-material then still located in the plant between the photocell 8 and the photocell 11 forms the trailing portion of the length of the work-material which, of course, is still not entirely rolled out, so that it still does not have its final length. However, the computing and control unit already knows accurately from multiplication, which is performed upon entry of the work-material, of the speed by the time t required by the leading end of the piece of work-material to travel from the photocell 11 to the photocell 8 the actual finish-rolled length of the trailing end portion still to be anticipated by the photocell 6 from the instant at which the photocell 11 signals the leading end of the work-material.Hence, the distance a between the two photocells 6 and 11 is not equal to the length of the trailing portion of the finish-rolled piece of work-material, but only corresponds to this, since the work-material is still in the rolling blocks 1 and 3 where its cross section is still being reduced and consequently where it is also being corespondingly elongated, so that, when it is in its finish-rolled state downstream of the rolling block 3, it is substantially longer than the distance a between the two photocells 6 and 11.
However, multiplication of the speed V, (measured by the speed indicator 7) by the time t accurately gives the length L, of the trailing portion of the finish-rolled piece of work-material. The length L1 of the trailing portion can be varied by shifting the photocell 11, if this is advantageous with regard to sub-division without residual ends or offcuts.
In practice, the length L, of the finish-rolled trailing portion which results from the not yet finish-rolled remaining work-material between the photocell 6 and the photocell 11, does not yet constitute the entire length of the trail
ing portion of the finish-rolled piece of work
material which has to be sub-divided without
offcuts. Namely, the length L2, located be
tween the immediately previous cut, made by
the separating device 5, and the photocell 6,
has to be added to this, namely at the instant
at which the end of the stock material reaches
the photocell 11.This length L2, which, purely
accidentally, may also be equal to the distance
between the photocell 6 and the separating
device 5, but which is at least this length, is
also known, since the distance to the last
made cut is continuously recorded in the sep
arating device 5 having an adjustable cut
length value. The length L2 is as a result of
this instantaneous distance between the last
made cut and the separating device 5, and the
known and constant distance between the
separating device 5 and the photocell 6. The
length L2, together with the length L1, forms
the actual total length of the trailing portion of
the finish-rolled piece of work-material which
then has to be sub-divided in a known manner
without offcuts.For this purpose, the separat
ing device receives new cut length values in a
known manner from a known optimization de
vice and cuts with these new cut length
values until the trailing end of the material has
reached the shears. Upon the entry of a fresh
piece of the stock material, such as when a
fresh leading end of the material passes the
photocell 11, the separating device 5 is again
set to the desired and stored fixed length
value or an integral multiple thereof, for the
purpose of sub-dividing the leading portion of
the length of material.
In the above embodiment, the rolling blocks
1 and 3 have been regarded as a rolling line with the photocell 11 forming a first control
point and the photocell 6 forming a second
control point, no functions being performed by
the photocell 11, the speed indicator 9 and
the separating device 10. However, either the
rolling block 1 or the rolling block 3 may not
be required, depending upon the rolling pro
gram and the stock material, since a great
reduction in cross section may be unnecessary
to achieve the desired finished cross section.
A desired reduction in cross section may be
achievable by one of the two blocks 1 or 3.
In principle, what has been said above applies
to this case. If, for example, the rolling block
1 is used, the photocell 8 undertakes the
function of the photocell 6, the speed indica
tor 9 undertakes the function of the speed
indicator 7, and the separating device 10 un
dertakes the function of the separating device
5. The photocell 8 thereupon assumes the
task of the second control point and the dis
tance a, then corresponds to the distance a in
the above embodiment where both blocks 1
and 3 are used.
Furthermore, by virtue of the arrangement of
the photocell 8, the speed indicator 9 and the
separating device 10, it is possible to perform the method in accordance with the invention separately for each rolling block 1 and 3, that is to say, twice in immediate succession. The photocell 8 then undertakes a double function, that is to say, that of the second control point for the rolling block 1 and that of the first control point for the rolling block 3. The distance a2 then coresponds to the distance a, but only for the rolling block 3. Such double performance of the method in accordance with the invention is primarily advisable when it is desired to perform a plausibility control in order to be able to detect any faults in the apparatus in a better and more rapid manner.
A further speed indicator 12 is provided upstream of the first rolling block 1 and may be disposed downstream of the photocell 11 and not only upstream thereof, as illustrated.
Changes in speed can be detected by the speed indicator 12 and the speed indicator 9 upstream of the second rolling block 3, particularly those changes in speed which occur during the measuring period, that is to say, in the period of time during which the leading end of the work-material is located between the photocell 11 and the photocell 8 or 6, according as to which of the last-mentioned photocells is used as a second control point.
These changes in speed would remain undetected and uncorrected if only the delivery speed downstream of the rolling block 3 is measured by the speed indicator 7.
In many cases, it is necessary to sever the trailing end of the work-material, that is to say, to crop it, owing to the fact that it is unserviceable and/or may cause faults. Its length is determined in accordance with empirical values and test results. If the work-material is to be cropped by the separating device 10 between, for example, the rolling blocks 1 and 3, this is possible with the plant in accordance with the invention even when the length of crop is greater than the distance between the separating device 10 and the photocell 8 which normally signals the end of the work material. For this purpose, as in the case of the sub-division of the trailing portion of the length without residual ends, the actual length of the trailing portion must be known before the rolling-out operation, this being possible by the method in accordance with the invention. The cropped length is subtracted from this length, and hence the position of the cropping cut is known. The speed indicator 9 at the same time serves as a device for measuring length, since it measures the length of the work-material passing through per unit of time. The pulse for the cropping cut occurs as soon as the calculated length of the work-material has passed the speed indicator 9. It is obvious that the known constant distances between the measuring points and the separating devices are fed to the computing unit and are taken into account.
Claims (8)
1. A method of sub-dividing tubular or rodshaped work-material downstream of one or a plurality of rolling lines disposed one behind the other, by means of a separating device adjustable to variable cut length values, in which the leading portion of each finish-rolled piece of work-material is sub-divided into desired fixed lengths or integral multiples thereof, and the trailing portion of each finishrolled piece is sub-divided into lengths which are only similar to one another and without producing any offcuts, the length of the trailing portion of the finish-rolled piece being ascertained from the measured speed of the work-material multiplied by the period of time between the passing of a first control point upstream of the rolling line or rolling lines and the passing of a second central point downstream of the rolling line or rolling lines by the leading end of the work-material, and in which the dividing of the trailing portion of the finishrolled workpiece without offcuts commences when the trailing end of the work-material passes the first control point.
2. A method as claimed in claim 1, in which a cropped end is cut from the leading end of the finish-rolled piece before its leading portion is cut into desired fixed lengths or multiples thereof.
3. A method as claimed in claim 1 or 2, in which a cropped end is cut from the trailing end of the finish-rolled piece after its trailing portion has been divided.
4. Apparatus for rolling and sub-dividing tubular rod-shaped work-material comprising one or a plurality of rolling lines disposed one behind the other and at least one separating device having a variable cut length value disposed downstream of the said rolling line or lines, a photocell disposed at a first control point upstream of the first stand of the rolling line or lines, a further photocell disposed at a second control point downstream of the last stand of the rolling line or lines, and a speed indicator for the emerging work-material disposed in the region of the second control point, the photocells and the speed indicator being connected to a computing and control unit for signalling the length of the trailing portion of the work-material and the value of the lengths into which it is to be cut without offcuts and for signalling the commencement of the division into cut lengths of such value.
5. Apparatus as claimed in claim 4, in which a speed indicator is disposed upstream of the first stand of the rolling line or lines.
6. Apparatus as claimed in claim 4 or 5, having two rolling lines disposed one behind the other and a third photocell disposed at a control point between such rolling lines and a speed indicator in the region of the latter control point.
7. A method of sub-dividing work material, substantially as herein described with reference to the accompanying drawing.
8. Apparatus for rolling and sub-dividing workpieces constructed and adapted to operate substantially as herein described with reference to and as illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843431030 DE3431030A1 (en) | 1984-08-23 | 1984-08-23 | METHOD AND DEVICE FOR THE REMAINLESS SUB-DIVISION AND BOWLING OF TUBULAR OR ROD-SHAPED ROLLING GOODS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8521008D0 GB8521008D0 (en) | 1985-09-25 |
| GB2163572A true GB2163572A (en) | 1986-02-26 |
Family
ID=6243715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08521008A Withdrawn GB2163572A (en) | 1984-08-23 | 1985-08-22 | A method of, and an apparatus for, sub-dividing and cropping tubular or rod-shaped work- material |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3431030A1 (en) |
| FR (1) | FR2571281A1 (en) |
| GB (1) | GB2163572A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011109511A1 (en) * | 2011-08-03 | 2013-02-07 | Salzgitter Mannesmann Präzisrohr GmbH | Method for controlling a production plant by means of a high-resolution local tracking of workpieces |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1406200A (en) * | 1972-09-30 | 1975-09-17 | Schloemann Ag | Dividing rolled lengths of stock into merchant lengths |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1427995B1 (en) * | 1962-03-10 | 1970-06-04 | Siemens Ag | Procedure for the determination of end lengths of rolled stock |
| DE2164332C3 (en) * | 1971-12-23 | 1979-04-19 | Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden | Control device for the elongation of a strand section |
| DE2351525A1 (en) * | 1973-10-13 | 1975-04-24 | Bbc Brown Boveri & Cie | Bar length monitoring system for rolling process - evaluates finished length from emerging length before the whole bar is finish rolled |
| JPS5495960A (en) * | 1978-01-13 | 1979-07-28 | Kobe Steel Ltd | Cutting treatment of rolled material in rolling mill for rods |
| DE3014359A1 (en) * | 1980-04-15 | 1981-10-22 | Kocks Technik GmbH & Co, 4000 Düsseldorf | PLUG-REDUCING ROLLING MILL FOR THE PRODUCTION OF FINISHED TUBES REDUCED IN DIAMETER AND WALL THICKNESS FROM NUT TUBE PIECES |
-
1984
- 1984-08-23 DE DE19843431030 patent/DE3431030A1/en not_active Withdrawn
-
1985
- 1985-06-05 FR FR8508453A patent/FR2571281A1/en active Pending
- 1985-08-22 GB GB08521008A patent/GB2163572A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1406200A (en) * | 1972-09-30 | 1975-09-17 | Schloemann Ag | Dividing rolled lengths of stock into merchant lengths |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3431030A1 (en) | 1986-03-06 |
| FR2571281A1 (en) | 1986-04-11 |
| GB8521008D0 (en) | 1985-09-25 |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |