CN1037943C

CN1037943C - No-twist slit-rolling approach ("NTA") apparatus and method for manufacturing steel reinforcing rod

Info

Publication number: CN1037943C
Application number: CN91100666.4A
Authority: CN
Inventors: 大卫德·泰恩·波格
Original assignee: David Tyne Bogg
Current assignee: David Tyne Bogg
Priority date: 1990-02-02
Filing date: 1991-02-02
Publication date: 1998-04-08
Anticipated expiration: 2006-02-02
Also published as: JPH04220110A; JPH0815613B2; CA2035502A1; CA2035502C; CN1054205A

Abstract

A no-twist (''NTA'') apparatus and method for manufacturing steel reinforcing bar which allows steel reinforcing bar to be manufactured with greater speed and precision than by conventional methods. The NTA method employs numerous stands, with the shafts of the rolls of the first two stands offset 45.degree. from a predetermined plane and 90.degree. from each other. The third and fourth stands comprise rolling and splitting stands and the shafts of their rollers are perpendicular or parallel to the predetermined plane and form equal angles with the shafts of the first two stands so that the bar can be fed to the rolling and splitting stands without intermediate twisting and the single bar can be split into a plurality of bar segments. The remaining stands are arranged into at least two lines of stands, in each of which the sides of the rolls of the first stand are offset 45.degree. in a first direction from the predetermined plane and the sides of the rolls of the second stand are offset 45.degree. in a second direction opposite to said first direction relative to the predetermined plane. Alternatively, the sides of the rolls of the first and second stands in the two lines are respectively offset either by 90 and 0.degree. or 0.degree. and 90.degree..

Description

The nothing that the manufacturing reinforcing bar is used is turned round formula incision-rolling apparatus and method

The present invention relates to reinforcing bar and make the field.

As everyone knows, depositing the prior art of various manufacturing reinforcing bars for many years.In road, bridge and other concrete structure engineering, reinforcing bar is indispensable.In making the process of reinforcing bar, the steel billet of heating in other words bar usually several to be known as " roll ", pass through between the counter-rotational roller, this process is referred to as " rolling ".In order to make the finished product reinforcing bar have enough hot strengths, repeat-rolling is necessary, in addition, rollingly also helps to remove the oxide skin of rod iron material or eliminates its blemish.Usually, a pair roller is installed in the frame by axle, and the parts of Gou Chenging are referred to as " working stand " like this.In case the rod iron material by this support, just presents the shape of its rolling profile.When rolling cylindrical reinforcing bar, the opposite flank of rod iron material must be alternately rolling by several supports, makes resulting product symmetry.

In traditional milling train design, all each supports all are arranged on the identical axis, when rod iron enters next group, it are reversed about 90 ° with twisting box or torsion roller.This method is called as " torsional technique ".Make and produce reinforcing bar in this way and often break down, improper as long as windup-degree is regulated, perhaps torsion roller wearing and tearing all can stop rod iron to enter next support with suitable alignment, even can't aim at fully.These problem difficult problems become and shut down the main cause of repairing in thorough solution.Another problem of producing reinforcing bar with torsional technique is: because rod iron material contact twisting box or torsion roller cause blemish probably.

Alternately arrange a plurality of supports this than new method with level, vertical axis, can eliminate many inherent defects of torsional technique, especially be like this when rolling cylindrical product, this layout is adopted by modern milling train, when especially producing the steel alloy product, because the surface smoothness requirement to final products is very high, this layout is comparatively suitable.

In the production of small diameter cylinders shape reinforcing bar, because the cross section of product is little, unit length in light weight in order to reach high production rate, just must keep very high mill speed.Yet because mill speed is very high, bar reverses the problem that causes between support even more serious.And, collect operation of rolling finished product reinforcing bar afterwards with so high speed and also produced problem.So the collection method that adopts is with the rolling reinforcing bar coiling lopping that finishes just usually, after, this reinforcing bar must straighten by separation process again.And when speed was low, the straight reinforcing bar of finished product can directly leave on the cold bed.

Recently, a kind of new method of producing reinforcing bar grows up, and it is that billet rolling is become a kind of section configuration, cuts and further be rolled into required shape and size then.This process is known as " cutting-rolling " method.The advantage of this method is: when productivity ratio was identical, mill speed can reduce by half, so the finished product reinforcing bar can be sent to traditional cold bed as the crow flies and gets on.Yet incision-rolling is as if using traditional horizontal support layout or level, vertical support to arrange just still have inherent defect as described below.

Fig. 1 a kind of typical horizontal support incision-rolling equipment that drawn is not expressed bar twisting box or torsion roller, base plate and roll rotation device.Between a plurality of supports, be included between last two supports 17 and 18, the rod iron material all must reverse.The every bar of discharging from support 17 to reverse requirement very high, become the difficulty in the production, this is because if bar generation problem wherein, the production of another root bar also will be interrupted.

Fig. 2 drawn a kind of typical level, vertical support incision-rolling equipment are not expressed bar-shaped twisting box or torsion roller, base plate and roll rotation device yet.Can exempt although great majority reverse, between the

support

14 and 15, and still need reverse from support 15 to 16 rod iron material.Also have, from support 17 to 18, the elliptical section that is cut open overlaps, and the rod iron material is bent at cross section major axis place, and this is not brought into play level, vertically arranged advantage comprehensively.

The invention provides a kind of apparatus and method of improved production reinforcing bar, it can eliminate the existing shortcoming of prior art method of producing reinforcing bar, and the inventive method is known as " NTA method " (" NTA " representative " nothing is turned round mode " meaning).Draw two embodiment of NTA method equipment therefor of Fig. 3 and 4, the tumbler of roll in the base plate that do not draw among the figure, frame and these supports, these all meet standard design, in order to represent just to have left out for the purpose of clear.

The objective of the invention is to reach like this:

A kind of nothing with rod iron material production reinforcing bar is turned round formula incision-rolling device, it has a plurality of allowing and is rolled the working stand that the rod iron material passes through, and each support comprises a plurality of rolls, and described roll has adjacent rolling profile, and by the roll side the axle be installed in the frame, described device comprises:

One first support, it be installed into contained roll side from reference planes towards the first direction deflection about 45 ° of states; One second support, it and first support segment distance of being separated by, and be installed into contained roll side from described reference planes towards 45 ° of states of the second direction deflection opposite with first direction, therefore the mutual deflection in roll side of these two supports is about 90 °, and the rod iron material that described first, second support is placed in this device begins a rolling end; Cut device, it comprises relative roll, the roll side of the side of described roll and described first, second support is about 45 and arranges, described incision device is positioned at the downstream of second support, be used for receiving the rod iron material that reverses without the centre, so that the rod iron material is cut into bar part separately from described second support; A plurality of follow-up supports, they are placed in cuts the device downstream, and the many horizontal rows that are in this device opposite end are in departing from support, so that receive each bar that separates part and finish rolling work; And conveyer, from cutting the described support that device is sent to the downstream, described during this period bar part need not reversed with each bar part for it.

Purpose of the present invention can also reach by the following method:

At every horizontal row in departing from support, about 45 ° of the roll sides that a support in the follow-up support is installed into it from described reference planes towards the first direction deflection, and another support and an above-mentioned support the be separated by segment distance of every horizontal row in departing from support, and the roll side that is installed into it is from described reference planes towards the second direction deflection relative with first direction about 45 °, therefore, the mutual deflection in roll side of these two supports is about 90 °.

At every horizontal row in departing from support, about 0 ° of the roll side that a support in the follow-up support is installed into it from described reference planes deflection, and another support and an above-mentioned support the be separated by segment distance of every horizontal row in departing from support, and about 90 ° of the roll sides that is installed into it, so about 90 ° of the mutual deflection in roll side of this two-phase support from described reference planes deflection.

Described nothing is turned round formula incision-rolling device and is also comprised delivery installation, so that the described bar-like portion of straight substantially attitude directly is sent to cold bed from described follow-up support.

Described reference planes are vertical planes.

The roll that is adjusted to adjacent support at the roll of follow-up support described in every row respectively is mutually 90 ° of states, therefore, reverse in the middle of not needing and just can arrive and pass through these follow-up supports from cutting a plurality of bars parts that device sends here, consequently, described bar is delivered to described first support from it and is discharged from the described row's of departing from final follow-up support with the bar-like portion form until it, does not reverse in the middle of all need not standing.

The roll of described first support has definite shape, can make to be rolled oval cross section of bar formation, and the major axis of described oval cross section is with respect to described reference planes inclination 45; The roll of described second support also has definite shape, can make to be rolled bar and form and to be roughly foursquare cross section, and each limit of described square cross section is parallel respectively or perpendicular to described reference planes; And the shape of described incision device roll can will be rolled the square cross section of bar along the direction incision vertical with its one side.

A kind of nothing with rod iron material production reinforcing bar is turned round formula incision-milling method, and it comprises the following steps:

A. rolled steel bar in one first support, in this support, roll be installed into the roll side from reference planes towards the first direction deflection about 45 ° of states;

B. rolled steel bar in one second support, in this support, roll be installed into the roll side from reference planes towards 45 ° of states of the second direction deflection opposite with first direction;

C. from second group rod iron material, reverse without the centre, just be sent to one and cut device, the roll side of described incision device is with respect to the laterally inclined 45 of the roll of first, second support;

D. rolled steel bar and be cut into a plurality of rod iron material parts in described incision device;

E. reverse without the centre from the bar part of cutting device, just transmit to the roll that departs from follow-up support along each horizontal row;

F. in each described lateral run-out row, with rolling each the rod iron material part of a plurality of described follow-up supports, about 90 ° of the mutual deflection of described follow-up support roll herein.

Described method also comprises: described reference planes are positioned plumbness.

At 45 approximately in described roll side of departing from follow-up support among the row with respect to described reference planes; Or depart among the row described, the roll side of a follow-up support becomes 90 ° approximately with respect to described reference planes, and the roll side of another adjacent set and described reference planes almost parallel.

First characteristics of two embodiment of this device are: the roll side arrangement of

support

13,14 becomes at 45 approximately with the vertical plane by A-A, and becomes 90 ° mutually approximately, and consequently, the rod iron material that offers support 15 does not need to reverse.

These second characteristics of installing first embodiment are: support 17 is vertically placed, support 18 horizontal positioned, their roll side arrangement becomes with vertical plane by A-A and becomes 0 ° and 90 ° respectively, and becomes 90 ° mutually approximately, thereby reaches the purpose that does not need to reverse with regard to the rolling bar of energy.

These second characteristics of installing second embodiment are: its support 17 ' with 18 ' the roll side arrangement become at 45 approximately with vertical plane by A-A according to opposite direction; And become 90 ° mutually approximately, do not need to reverse the just purpose of energy rolled steel bar thereby reach.

Two embodiment to apparatus of the present invention make an explanation with reference to the accompanying drawings, wherein:

Fig. 1 traditional incision-rolling equipment that a plurality of horizontal supports are housed that draws.

Fig. 2 traditional incision-rolling equipment that a plurality of vertical, horizontal supports are housed that draws.

Fig. 3 and Fig. 4 are the schematic diagrames of two embodiment of apparatus of the present invention, the tumbler of roll in do not draw among the figure base plate, frame and the support, and the part of being left out all meets standard design.Except

support

17 and 17 ', 18 and 18 ' direction different, these two embodiment are identical.

Fig. 5 to 13 draw several supports be in different rolling sequences in rod iron material cross section, they are identical in two embodiment shown in Fig. 3,4.

Fig. 5 is the rod iron material at the cross-sectional view that enters before the support 13 when plane A-A observes.

The view that Fig. 6 is a support 13 when plane A-A observes.

Fig. 7 is rolling and aimed at the rod iron material cross-sectional view of the support 14 that will enter through support 13, observes along plane A-A.

The view that Fig. 8 is a support 14 when plane A-A observes.

Fig. 9 is the cross-sectional view of blank after support 14 is rolling, observes along plane A-A.

Figure 10 is a view of support 15, observes along plane A-A.

Figure 11 is rolling and aimed at the steel billet material cross-sectional view of the support 16 that will enter through support 15, observes along plane A-A.

Figure 12 is a view of support 16, observes along plane A-A.

Figure 13 is rolling and cut, enter the cross-sectional view of a rod iron material before the support 17 through support 16, observes along plane A-A.

Figure 14 to 17 draw first embodiment shown in Figure 3 exclusive other support and the cross section of rod iron material at different rolling sequences.

Figure 14 is a view of support 17, observes along plane A-A.

Figure 15 is rolling and aimed at the steel billet material cross-sectional view of the support 18 that will enter through support 17, observes along plane A-A.

Figure 16 is a view of support 18, observes along plane A-A.

Figure 17 is the cross-sectional view of finished product reinforcing bar, observes along plane A-A.

Figure 18 to 21 draw second embodiment shown in Figure 4 exclusive other support and the cross section of rod iron material at different rolling sequences.

Figure 18 be support 17 ' a view, observe along plane A-A.

Figure 19 be through support 17 ' rolling and aimed at the support 18 that will enter ' steel billet material cross-sectional view, observe along plane A-A.

Figure 20 be support 18 ' a view, observe along plane A-A.

Figure 21 is the cross-sectional view of finished product reinforcing bar, observes along plane A-A.

At first referring to accompanying drawing 3,4, they are schematic perspective views of first, second embodiment of apparatus of the present invention.For the sake of clarity, the base plate of this device, frame and the driving mechanism of roll rotation in each support is not all drawn.These devices do not need to reverse the rod iron material, just can be rolled, be shaped the rod iron material.Can see that from Fig. 3,4 the roll side of support is arranged to different directions with the vertical plane by A-A.

Make reinforcing bar with first embodiment of the invention shown in Figure 3, its step is as follows: initial steel billet material shown in Figure 5 is earlier rolling by first support 13, the rolled surface of support 13 constitutes an ellipse, and its orientation be the side 233 of roll 23 from vertical plane A-A towards about 45 ° of a direction deflection, first support 13 is represented comparatively in detail in Fig. 6.Consequent bar cross section is elliptical shape shown in Figure 7, be rolled by second support 14 again, second support 14 is represented comparatively detailed in Fig. 8, its rolled surface 241 constitutes a square, and its orientation is the side 243 of roll 24 from vertical plane A-A towards the second direction deflection about 45 °.Because the longer size of the oval cross section that shuts out is tiltedly facing to the following square rolled surface of second support 14, oval rod iron material no longer needs to reverse and just can enter second support 14.

Resulting Steel Bar During has the foursquare cross section that is roughly shown in Figure 9, and then it is rolling by support 15, the rolled surface 251 of support 15 constitutes two overlapping a little circles, and its side 253 that is oriented to roll 25 from vertical plane A-A deflection about 0 °, can be clear that this situation by Figure 10.The rod iron material cross section of discharging from support 15 is two overlapping a little circles, as shown in figure 11.After this, the rod iron material is rolled by support 16 again, and support 16 has identical spatial orientation with last support, but rolled surface 261 constitute two near circle, this represents the clearlyest in Figure 12.Support 16 is cut into two with this bar and is roughly circular bar in rolling, one of them is as shown in Figure 13.

Then, these two bars being sent to two row support 17-18 separately respectively is rolled.First support 17 in every row's support is installed into about 90 ° of the side 273 vertical plane A-A deflections of roll 27, and rolled surface 271 roughly constitutes a circle, as shown in figure 14.Roughly have as circular cross section shown in Figure 15 by the support 17 rolling rod iron material that obtain.These two rod iron material are rolled by support 18 respectively again, and as seen from Figure 16, support 18 has one and is roughly circular roll pass 281, and the side 283 that is installed into roll 28 is from about 0 ° of a vertical plane deflection.The skew direction of these two supports makes the rod iron material not need to reverse, and just can make its whole side obtain rolling equably.Final products are two steel wire rods with circular cross section, and one of them cross section as shown in figure 17.

In second embodiment of the invention shown in Figure 4, except being positioned at laterally arranging the orientation of supports of this device afterbody, all identical with first embodiment, described device afterbody is meant the rolling end of rod iron material more.Above the phase I of carrying out with reference to Fig. 3-13 describes still constant.

In a second embodiment, two bars are rolled respectively by two rows support separately after support 16, each support 17 in every row's support ' be installed into roll 27 ' side 273 ' about 45 ° from vertical plane A-A towards the first direction deflection, and rolled surface 271 ' ellipse of formation, as shown in figure 18.Have as oval cross section shown in Figure 19 by support 17 ' rolling rod iron material that obtains.These two rod iron material are again by support 18 ' be rolled, the rolled surface 281 of support 18 ' circle of formation ', and be installed into roll 28 ' side 283 ' from a vertical plane A-A about 45 ° towards the second direction deflection relative with first direction.That is to say these two supports all from 45 ° of vertical plane deflections, and be mutually 90 °,, just can make the whole side of rod iron material obtain rolling uniformly so do not need to reverse.Final products are two steel wire rods with circular cross section, and one of them cross section as shown in figure 21.

Below these two embodiment of the invention are explained that in detail each support and roll product thereof are as following:

Fig. 5 to 13 is general for two embodiment of this device, and they all pass through plane A-A observation, is used for representing the orientation of support and the cross section of the rolling back of each support of process rod iron material.

Fig. 5 is that the rod iron material is by support 13 rolling preceding cross-sectional views.

Fig. 6 is the detail drawing that support 13 is observed along plane A-A, its frame of not drawing.Support 13 comprises two adjacent rollers 23 with recessed half elliptic roll pass, and each roll is along separately parallel axes 232 backward rotation, and roll side 233 from the plane by A-A towards about 45 ° of a direction deflection.

Fig. 7 is the cross-sectional view of the oval rod iron material after support 13 is rolling, and oval large-size is from about 45 ° of the plane deflection by A-A.

Fig. 8 is illustrated in the support 14 when plane A-A observes, its frame of not drawing.Support 14 comprises two adjacent rollers 24 with the rolling profile of triangle, each roll is along separately parallel axes 242 backward rotation, and roll side 243 is from about 45 ° of the plane deflection by A-A, and skew direction is opposite with the skew direction of roll in the support 13.Therefore constitute about 90 ° of the roll 23 of

support

13 and 14 and 24 the mutual deflection in side.

Fig. 9 is the cross-sectional view of the square rod iron material after support 14 is rolling, observes along A-A.

Figure 10 is a support 15 in a view when A-A observes, its frame of not drawing.Support 15 comprises two adjacent rollers 25, and each roll 25 all has two overlapping a little semicircle roll pass 251, and along separately parallel axes 252 backward rotation, roll side 253 is parallel to the plane by A-A.

The cross-sectional view that Figure 11 is the rod iron material when support 15 is discharged is observed along plane A-A.

Figure 12 is a support 16 in a view when plane A-A observes, its frame of not drawing.Support 16 comprises two adjacent rollers 26, and each roll 26 all has the semicircle roll pass 261 of two adjacency, and around separately parallel axes 262 backward rotation, roll side 263 is parallel to the plane by A-A.Support 16 is cut into two with the rod iron material that enters shown in Figure 11.

The cross-sectional view that Figure 13 is the rod iron material when support 16 is discharged is observed along plane A-A.

Figure 14 to 17 is that first embodiment is exclusive.

Figure 14 is a support 17 in a view when plane A-A observes, its frame of not drawing.Support 17 comprises two adjacent rollers 27, and each roll 27 has a recessed semicircle roll pass 271, and around separately parallel axes 272 backward rotation, and roll side 273 is from about 90 ° of the plane deflection by A-A.

The cross-sectional view that Figure 15 is the rod iron material when support 17 is discharged.

The view that Figure 16 is a support 18 when plane A-A observes, its phase frame does not draw.Support 18 comprises two adjacent rollers 28, and each roll 28 has a recessed semicircle roll pass 281, and around separately parallel axes 282 backward rotation, and roll side 28 is from about 0 ° of the plane deflection by A-A.

Figure 17 is the cross-sectional view from the finished product reinforcing bar of support 18 discharges.

Except support 17 ' and 18 ' orientation, second embodiment and first embodiment of this device are basic identical, have described the characteristics of second embodiment among Figure 18 to 21.

Figure 18 is a support 17 ' in a view when plane A-A observes, the frame of not drawing.Two adjacent rollers 27 of support 17 ' comprise ', a recessed half elliptic roll pass 271 of each roll 27 ' have ', and around parallel axes 272 ' backward rotation separately, roll side 273 ' from the plane by A-A is towards about 45 ° of a direction deflection.

Cross-sectional view when Figure 19 is the rod iron material from support 17 ' discharge.

Figure 20 is a support 18 ' in a view when plane A-A observes, its frame of not drawing.Two adjacent rollers 28 of support 18 ' comprise ', a recessed half elliptic roll pass 281 of each roll 28 ' have ', and around parallel axes 282 ' backward rotation separately, roll side 283 ' from the plane by A-A is towards about 45 ° with the rightabout deflection of support 17 ' roll.

Figure 21 is the cross-sectional view from the finished product reinforcing bar of support 18 ' discharge.

Should be noted that accompanying drawing does not draw in the ratio of strictness for the ease of illustrating and describe characteristics more of the present invention.

Accompanying drawing and above-mentioned explanation are not unique forms of structure of the present invention and method of work.Fairly obvious, the people who is familiar with this technical ability can make multiple change in the scope of the principle of the invention.When situation is suitable, can changes parts shape, quantity or carry out equivalent substitution.Some concrete word only has the meaning of general narration, does not provide constraints.

Claims

1. the nothing with rod iron material production reinforcing bar is turned round formula incision-rolling device, it has a plurality of allowing and is rolled the working stand that the rod iron material passes through, each support comprises a plurality of rolls, described roll has adjacent roll pass, and by the roll side the axle be installed in the frame, described device comprises:

One first support, it be installed into contained roll side from reference planes towards the first direction deflection about 45 ° of states; One second support, it and first support segment distance of being separated by, and be installed into contained roll side from described reference planes towards 45 ° of states of the second direction deflection opposite with first aspect, therefore the mutual deflection in roll side of these two supports is about 90 °, and the rod iron material that described first, second support is placed in this device begins a rolling end; Cut device, it comprises relative roll, the roll side of the side of described roll and described first, second support is about 45 and arranges, described incision device is positioned at the downstream of second support, be used for receiving the rod iron material that reverses without the centre, so that the rod iron material is cut into bar part separately from described second support; A plurality of follow-up supports, they are placed in cuts the device downstream, and the many horizontal rows that are in this device opposite end are in departing from support, so that receive each bar that separates part and finish rolling work; And conveyer, from cutting the described support that device is sent to the downstream, described during this period bar part need not reversed with each bar part for it.

2. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, at every horizontal row in departing from support, about 45 ° of the roll sides that a support in the follow-up support is installed into it from described reference planes towards the first direction deflection, and another support and an above-mentioned support the be separated by segment distance of every horizontal row in departing from support, and the roll side that is installed into it is from described reference planes towards the second direction deflection relative with first direction about 45 °, therefore, the mutual deflection in roll side of these two supports is about 90 °.

3. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, at every horizontal row in departing from support, about 0 ° of the roll side that a support in the follow-up support is installed into it from described reference planes deflection, and another support and an above-mentioned support the be separated by segment distance of every horizontal row in departing from support, and about 90 ° of the roll sides that is installed into it, so about 90 ° of the mutual deflection in roll side of these two supports from described reference planes deflection.

4. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, and also comprises delivery installation, so that the described bar-like portion of straight substantially attitude directly is sent to cold bed from described follow-up support.

5. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, and described reference planes are vertical planes.

6. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, the roll that is adjusted to adjacent support at the roll of follow-up support described in every row respectively is mutually 90 ° of states, therefore, reverse in the middle of not needing and just can arrive and pass through these follow-up supports from cutting a plurality of bars parts that device sends here, consequently, described bar is delivered to described first support from it and is discharged from the described row's of departing from final follow-up support with the bar-like portion form until it, does not reverse in the middle of all need not standing.

7. nothing according to claim 1 is turned round formula incision-rolling device, it is characterized by, the roll of described first support has definite shape, can make to be rolled bar and form an oval cross section, described ellipse transversal major axis with respect to described reference planes inclination 45; The roll of described second support also has definite shape, can make to be rolled bar and form and to be roughly foursquare cross section, and each limit of described square cross section is parallel respectively or perpendicular to described reference planes; And the shape of described incision device roll can will be rolled the square cross section of bar along the direction incision vertical with its one side.

8. the nothing with rod iron material production reinforcing bar is turned round formula incision-milling method, and it comprises the following steps:

A. rolled steel bar in one first support, in this support, roll be installed into the roll side from reference planes towards the first direction deflection about 45 ° of states:

C. from second group rod iron material, reverse without the centre, just be sent to one and cut device, the roll side of described incision device is with respect to the laterally inclined 45 of the roll of first, second support.

9. method according to claim 8 is characterized by, and also comprises: described reference planes are positioned plumbness.

10. method according to claim 8 is characterized by, and is at 45 approximately with respect to described reference planes in described roll side of departing from follow-up support among the row; Or depart among the row described, the roll side of a follow-up support becomes 90 ° approximately with respect to described reference planes, and the roll side of another adjacent set and described reference planes almost parallel.